+static struct kvm_pgtable_mm_ops kvm_user_mm_ops = {
+ /* We shouldn't need any other callback to walk the PT */
+ .phys_to_virt = kvm_host_va,
+};
+
+static int get_user_mapping_size(struct kvm *kvm, u64 addr)
+{
+ struct kvm_pgtable pgt = {
+ .pgd = (kvm_pte_t *)kvm->mm->pgd,
+ .ia_bits = VA_BITS,
+ .start_level = (KVM_PGTABLE_MAX_LEVELS -
+ CONFIG_PGTABLE_LEVELS),
+ .mm_ops = &kvm_user_mm_ops,
+ };
+ kvm_pte_t pte = 0; /* Keep GCC quiet... */
+ u32 level = ~0;
+ int ret;
+
+ ret = kvm_pgtable_get_leaf(&pgt, addr, &pte, &level);
+ VM_BUG_ON(ret);
+ VM_BUG_ON(level >= KVM_PGTABLE_MAX_LEVELS);
+ VM_BUG_ON(!(pte & PTE_VALID));
+
+ return BIT(ARM64_HW_PGTABLE_LEVEL_SHIFT(level));
+}
+