Split svm_flush_tlb_current() into separate callbacks for the 3 cases (guest/all/current), and issue the required Hyper-V hypercall when a Hyper-V TLB flush is needed. The most important case where the TLB flush was missing is when loading a new PGD, which is followed by what is now svm_flush_tlb_current(). Queued, thanks. I changed the return value to -EOPNOTSUPP. Paolo