1 files changed, 24 insertions, 13 deletions

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 7c9fce512625..992e651540e8 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -3575,10 +3575,14 @@ static void mmu_free_root_page(struct kvm *kvm, hpa_t *root_hpa,
 	if (WARN_ON_ONCE(!sp))
 		return;
 
-	if (is_tdp_mmu_page(sp))
+	if (is_tdp_mmu_page(sp)) {
+		lockdep_assert_held_read(&kvm->mmu_lock);
 		kvm_tdp_mmu_put_root(kvm, sp);
-	else if (!--sp->root_count && sp->role.invalid)
-		kvm_mmu_prepare_zap_page(kvm, sp, invalid_list);
+	} else {
+		lockdep_assert_held_write(&kvm->mmu_lock);
+		if (!--sp->root_count && sp->role.invalid)
+			kvm_mmu_prepare_zap_page(kvm, sp, invalid_list);
+	}
 
 	*root_hpa = INVALID_PAGE;
 }
@@ -3587,6 +3591,7 @@ static void mmu_free_root_page(struct kvm *kvm, hpa_t *root_hpa,
 void kvm_mmu_free_roots(struct kvm *kvm, struct kvm_mmu *mmu,
 			ulong roots_to_free)
 {
+	bool is_tdp_mmu = tdp_mmu_enabled && mmu->root_role.direct;
 	int i;
 	LIST_HEAD(invalid_list);
 	bool free_active_root;
@@ -3609,7 +3614,10 @@ void kvm_mmu_free_roots(struct kvm *kvm, struct kvm_mmu *mmu,
 			return;
 	}
 
-	write_lock(&kvm->mmu_lock);
+	if (is_tdp_mmu)
+		read_lock(&kvm->mmu_lock);
+	else
+		write_lock(&kvm->mmu_lock);
 
 	for (i = 0; i < KVM_MMU_NUM_PREV_ROOTS; i++)
 		if (roots_to_free & KVM_MMU_ROOT_PREVIOUS(i))
@@ -3635,8 +3643,13 @@ void kvm_mmu_free_roots(struct kvm *kvm, struct kvm_mmu *mmu,
 		mmu->root.pgd = 0;
 	}
 
-	kvm_mmu_commit_zap_page(kvm, &invalid_list);
-	write_unlock(&kvm->mmu_lock);
+	if (is_tdp_mmu) {
+		read_unlock(&kvm->mmu_lock);
+		WARN_ON_ONCE(!list_empty(&invalid_list));
+	} else {
+		kvm_mmu_commit_zap_page(kvm, &invalid_list);
+		write_unlock(&kvm->mmu_lock);
+	}
 }
 EXPORT_SYMBOL_GPL(kvm_mmu_free_roots);
 
@@ -3693,15 +3706,15 @@ static int mmu_alloc_direct_roots(struct kvm_vcpu *vcpu)
 	unsigned i;
 	int r;
 
+	if (tdp_mmu_enabled)
+		return kvm_tdp_mmu_alloc_root(vcpu);
+
 	write_lock(&vcpu->kvm->mmu_lock);
 	r = make_mmu_pages_available(vcpu);
 	if (r < 0)
 		goto out_unlock;
 
-	if (tdp_mmu_enabled) {
-		root = kvm_tdp_mmu_get_vcpu_root_hpa(vcpu);
-		mmu->root.hpa = root;
-	} else if (shadow_root_level >= PT64_ROOT_4LEVEL) {
+	if (shadow_root_level >= PT64_ROOT_4LEVEL) {
 		root = mmu_alloc_root(vcpu, 0, 0, shadow_root_level);
 		mmu->root.hpa = root;
 	} else if (shadow_root_level == PT32E_ROOT_LEVEL) {
@@ -7039,9 +7052,7 @@ int kvm_mmu_vendor_module_init(void)
 
 	kvm_mmu_reset_all_pte_masks();
 
-	pte_list_desc_cache = kmem_cache_create("pte_list_desc",
-					    sizeof(struct pte_list_desc),
-					    0, SLAB_ACCOUNT, NULL);
+	pte_list_desc_cache = KMEM_CACHE(pte_list_desc, SLAB_ACCOUNT);
 	if (!pte_list_desc_cache)
 		goto out;