Commit 3a9a4aa5 authored by Ben Gardon's avatar Ben Gardon Committed by Paolo Bonzini
Browse files

KVM: x86/mmu: Add lockdep when setting a TDP MMU SPTE 



Add lockdep to __tdp_mmu_set_spte to ensure that SPTEs are only modified
under the MMU lock.

No functional change intended.

Reviewed-by: default avatarPeter Feiner <pfeiner@google.com>
Reviewed-by: default avatarSean Christopherson <seanjc@google.com>
Acked-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarBen Gardon <bgardon@google.com>
Message-Id: <20210202185734.1680553-4-bgardon@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent fe43fa2f

arch/x86/kvm/mmu/tdp_mmu.c

+2 −0
Original line number Diff line number Diff line
@@ -381,6 +381,8 @@ static inline void __tdp_mmu_set_spte(struct kvm *kvm, struct tdp_iter *iter, 
	struct kvm_mmu_page *root = sptep_to_sp(root_pt);

	int as_id = kvm_mmu_page_as_id(root);



	lockdep_assert_held(&kvm->mmu_lock);



	WRITE_ONCE(*iter->sptep, new_spte);



	__handle_changed_spte(kvm, as_id, iter->gfn, iter->old_spte, new_spte,