From: Ben Gardon <bgar...@google.com>
[ Upstream commit 3a9a4aa5657471a02ffb7f9b7f3b7a468b3f257b ]
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 <pfei...@google.com>
Reviewed-by: Sean Christopherson <sea...@google.com>
Acked-by: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Ben Gardon <bgar...@google.com>
Message-Id: <20210202185734.1680553-4-bgar...@google.com>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
arch/x86/kvm/mmu/tdp_mmu.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index 0567286fba39..3a8bbc812a28 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c
@@ -365,6 +365,8 @@ 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,
--
2.30.1
