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KVM: x86/mmu: Replace open coded usage of tdp_mmu_page with is_tdp_mmu_page()

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Use is_tdp_mmu_page() instead of querying sp->tdp_mmu_page directly so
that all users benefit if KVM ever finds a way to optimize the logic.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20221012181702.3663607-10-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2022-10-12 18:17:00 +00:00 committed by Paolo Bonzini
parent 362871d74f
commit aeb568a1a6
2 changed files with 2 additions and 2 deletions
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2
arch/x86/kvm/mmu/mmu.c
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@ -1928,7 +1928,7 @@ static bool is_obsolete_sp(struct kvm *kvm, struct kvm_mmu_page *sp)
return true;
/* TDP MMU pages do not use the MMU generation. */
return !sp->tdp_mmu_page &&
return !is_tdp_mmu_page(sp) &&
unlikely(sp->mmu_valid_gen != kvm->arch.mmu_valid_gen);
}

2
arch/x86/kvm/mmu/tdp_mmu.c
View File

@ -133,7 +133,7 @@ void kvm_tdp_mmu_put_root(struct kvm *kvm, struct kvm_mmu_page *root,
if (!refcount_dec_and_test(&root->tdp_mmu_root_count))
return;
WARN_ON(!root->tdp_mmu_page);
WARN_ON(!is_tdp_mmu_page(root));
/*
* The root now has refcount=0. It is valid, but readers already