On 21/10/20 17:02, Yu Zhang wrote: >> void kvm_tdp_mmu_free_root(struct kvm *kvm, struct kvm_mmu_page *root) >> { >> + gfn_t max_gfn = 1ULL << (boot_cpu_data.x86_phys_bits - PAGE_SHIFT); >> + > boot_cpu_data.x86_phys_bits is the host address width. Value of the guest's > may vary. So maybe we should just traverse the memslots and zap the gfn ranges > in each of them? > It must be smaller than the host value for two-dimensional paging, though. Paolo