Commit 83b83a02 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
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KVM: x86/mmu: Use common TDP MMU zap helper for MMU notifier unmap hook 



Use the common TDP MMU zap helper when handling an MMU notifier unmap
event, the two flows are semantically identical.  Consolidate the code in
preparation for a future bug fix, as both kvm_tdp_mmu_unmap_gfn_range()
and __kvm_tdp_mmu_zap_gfn_range() are guilty of not zapping SPTEs in
invalid roots.

No functional change intended.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
Message-Id: <20211215011557.399940-2-seanjc@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent fcb732d8

arch/x86/kvm/mmu/tdp_mmu.c

+2 −7
Original line number Diff line number Diff line
@@ -1032,13 +1032,8 @@ int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault) 
bool kvm_tdp_mmu_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range,

				 bool flush)

{

	struct kvm_mmu_page *root;



	for_each_tdp_mmu_root_yield_safe(kvm, root, range->slot->as_id, false)

		flush = zap_gfn_range(kvm, root, range->start, range->end,

				      range->may_block, flush, false);



	return flush;

	return __kvm_tdp_mmu_zap_gfn_range(kvm, range->slot->as_id, range->start,

					   range->end, range->may_block, flush);

}



typedef bool (*tdp_handler_t)(struct kvm *kvm, struct tdp_iter *iter,