kvm_vcpu_gfn_to_hva_prot
hva = kvm_vcpu_gfn_to_hva_prot(vcpu, cp->a1 >> PAGE_SHIFT, NULL);
unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
addr = kvm_vcpu_gfn_to_hva_prot(vcpu, gfn, NULL);