1 files changed, 28 insertions, 25 deletions

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 0dfee7576e88c1..a852af5c3214d7 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -154,10 +154,9 @@ static void kvm_uevent_notify_change(unsigned int type, struct kvm *kvm);
 static unsigned long long kvm_createvm_count;
 static unsigned long long kvm_active_vms;
 
-__weak int kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
-		unsigned long start, unsigned long end, bool blockable)
+__weak void kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
+						   unsigned long start, unsigned long end)
 {
-	return 0;
 }
 
 bool kvm_is_zone_device_pfn(kvm_pfn_t pfn)
@@ -383,6 +382,18 @@ static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn)
 	return container_of(mn, struct kvm, mmu_notifier);
 }
 
+static void kvm_mmu_notifier_invalidate_range(struct mmu_notifier *mn,
+					      struct mm_struct *mm,
+					      unsigned long start, unsigned long end)
+{
+	struct kvm *kvm = mmu_notifier_to_kvm(mn);
+	int idx;
+
+	idx = srcu_read_lock(&kvm->srcu);
+	kvm_arch_mmu_notifier_invalidate_range(kvm, start, end);
+	srcu_read_unlock(&kvm->srcu, idx);
+}
+
 static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn,
 					struct mm_struct *mm,
 					unsigned long address,
@@ -407,7 +418,6 @@ static int kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
 {
 	struct kvm *kvm = mmu_notifier_to_kvm(mn);
 	int need_tlb_flush = 0, idx;
-	int ret;
 
 	idx = srcu_read_lock(&kvm->srcu);
 	spin_lock(&kvm->mmu_lock);
@@ -424,14 +434,9 @@ static int kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
 		kvm_flush_remote_tlbs(kvm);
 
 	spin_unlock(&kvm->mmu_lock);
-
-	ret = kvm_arch_mmu_notifier_invalidate_range(kvm, range->start,
-					range->end,
-					mmu_notifier_range_blockable(range));
-
 	srcu_read_unlock(&kvm->srcu, idx);
 
-	return ret;
+	return 0;
 }
 
 static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn,
@@ -537,6 +542,7 @@ static void kvm_mmu_notifier_release(struct mmu_notifier *mn,
 }
 
 static const struct mmu_notifier_ops kvm_mmu_notifier_ops = {
+	.invalidate_range	= kvm_mmu_notifier_invalidate_range,
 	.invalidate_range_start	= kvm_mmu_notifier_invalidate_range_start,
 	.invalidate_range_end	= kvm_mmu_notifier_invalidate_range_end,
 	.clear_flush_young	= kvm_mmu_notifier_clear_flush_young,
@@ -2970,7 +2976,6 @@ static int kvm_vcpu_release(struct inode *inode, struct file *filp)
 {
 	struct kvm_vcpu *vcpu = filp->private_data;
 
-	debugfs_remove_recursive(vcpu->debugfs_dentry);
 	kvm_put_kvm(vcpu->kvm);
 	return 0;
 }
@@ -2997,16 +3002,17 @@ static int create_vcpu_fd(struct kvm_vcpu *vcpu)
 static void kvm_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
 {
 #ifdef __KVM_HAVE_ARCH_VCPU_DEBUGFS
+	struct dentry *debugfs_dentry;
 	char dir_name[ITOA_MAX_LEN * 2];
 
 	if (!debugfs_initialized())
 		return;
 
 	snprintf(dir_name, sizeof(dir_name), "vcpu%d", vcpu->vcpu_id);
-	vcpu->debugfs_dentry = debugfs_create_dir(dir_name,
-						  vcpu->kvm->debugfs_dentry);
+	debugfs_dentry = debugfs_create_dir(dir_name,
+					    vcpu->kvm->debugfs_dentry);
 
-	kvm_arch_create_vcpu_debugfs(vcpu);
+	kvm_arch_create_vcpu_debugfs(vcpu, debugfs_dentry);
 #endif
 }
 
@@ -3743,21 +3749,18 @@ static long kvm_vm_ioctl(struct file *filp,
 		if (routing.flags)
 			goto out;
 		if (routing.nr) {
-			r = -ENOMEM;
-			entries = vmalloc(array_size(sizeof(*entries),
-						     routing.nr));
-			if (!entries)
-				goto out;
-			r = -EFAULT;
 			urouting = argp;
-			if (copy_from_user(entries, urouting->entries,
-					   routing.nr * sizeof(*entries)))
-				goto out_free_irq_routing;
+			entries = vmemdup_user(urouting->entries,
+					       array_size(sizeof(*entries),
+							  routing.nr));
+			if (IS_ERR(entries)) {
+				r = PTR_ERR(entries);
+				goto out;
+			}
 		}
 		r = kvm_set_irq_routing(kvm, entries, routing.nr,
 					routing.flags);
-out_free_irq_routing:
-		vfree(entries);
+		kvfree(entries);
 		break;
 	}
 #endif /* CONFIG_HAVE_KVM_IRQ_ROUTING */