diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
index cb924c6d56a6ff765a3e27ecda49f6a9e7d4c027..f2a9874ff5cbe2615f0f9113d71fbfb333394450 100644
--- a/arch/arm/kvm/mmu.c
+++ b/arch/arm/kvm/mmu.c
@@ -919,7 +919,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
 	if (!hugetlb && !force_pte)
 		hugetlb = transparent_hugepage_adjust(&pfn, &fault_ipa);
 
-	fault_ipa_uncached = false;
+	fault_ipa_uncached = memslot->flags & KVM_MEMSLOT_INCOHERENT;
 
 	if (hugetlb) {
 		pmd_t new_pmd = pfn_pmd(pfn, mem_type);
@@ -1298,11 +1298,12 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm,
 		hva = vm_end;
 	} while (hva < reg_end);
 
-	if (ret) {
-		spin_lock(&kvm->mmu_lock);
+	spin_lock(&kvm->mmu_lock);
+	if (ret)
 		unmap_stage2_range(kvm, mem->guest_phys_addr, mem->memory_size);
-		spin_unlock(&kvm->mmu_lock);
-	}
+	else
+		stage2_flush_memslot(kvm, memslot);
+	spin_unlock(&kvm->mmu_lock);
 	return ret;
 }
 
@@ -1314,6 +1315,15 @@ void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 			    unsigned long npages)
 {
+	/*
+	 * Readonly memslots are not incoherent with the caches by definition,
+	 * but in practice, they are used mostly to emulate ROMs or NOR flashes
+	 * that the guest may consider devices and hence map as uncached.
+	 * To prevent incoherency issues in these cases, tag all readonly
+	 * regions as incoherent.
+	 */
+	if (slot->flags & KVM_MEM_READONLY)
+		slot->flags |= KVM_MEMSLOT_INCOHERENT;
 	return 0;
 }