From: Ben Gardon Date: Tue, 2 Feb 2021 18:57:09 +0000 (-0800) Subject: KVM: x86/mmu: Add lockdep when setting a TDP MMU SPTE X-Git-Tag: io_uring-worker.v3-2021-02-25~38^2~91 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=3a9a4aa5657471a02ffb7f9b7f3b7a468b3f257b;p=linux-2.6-block.git 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: Peter Feiner Reviewed-by: Sean Christopherson Acked-by: Paolo Bonzini Signed-off-by: Ben Gardon Message-Id: <20210202185734.1680553-4-bgardon@google.com> Signed-off-by: Paolo Bonzini --- diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index ef3d3e058fa0..05e6e2c4554f 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -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,