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    Subject[PATCH v2 03/28] KVM: x86/mmu: Add lockdep when setting a TDP MMU SPTE
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    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 <pfeiner@google.com>
    Reviewed-by: Sean Christopherson <seanjc@google.com>
    Acked-by: Paolo Bonzini <pbonzini@redhat.com>
    Signed-off-by: Ben Gardon <bgardon@google.com>
    ---
    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 3d8cca238eba..b83a6a3ad29c 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,
    --
    2.30.0.365.g02bc693789-goog
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