Sean, sorry for the late reply. Thanks for your careful explanations. > For emulation of any instruction/flow that starts with a guest virtual address. > On Intel CPUs, that includes quite literally any "full" instruction emulation, > since KVM needs to translate CS:RIP to a guest physical address in order to fetch > the guest's code stream. KVM can't avoid "full" emulation unless the guest is > heavily enlightened, e.g. to avoid string I/O, among many other things. Do you mean the emulated MMU is needed when it *only* wants to translate GVAs to GPAs in the guest level? In such cases, the hardware MMU cannot be used because hardware MMU can only translate GVAs to HPAs, right?
