On 2024-03-01 09:28 AM, isaku.yamahata@xxxxxxxxx wrote: > From: Isaku Yamahata <isaku.yamahata@xxxxxxxxx> > > Implementation: > - x86 KVM MMU > In x86 KVM MMU, I chose to use kvm_mmu_do_page_fault(). It's not confined to > KVM TDP MMU. We can restrict it to KVM TDP MMU and introduce an optimized > version. Restricting to TDP MMU seems like a good idea. But I'm not quite sure how to reliably do that from a vCPU context. Checking for TDP being enabled is easy, but what if the vCPU is in guest-mode? Perhaps we can just return an error out to userspace if the vCPU is in guest-mode or TDP is disabled, and make it userspace's problem to do memory mapping before loading any vCPU state.
