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KVM: x86/mmu: Use common TDP MMU zap helper for MMU notifier unmap hook

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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: Sean Christopherson <seanjc@google.com>
Message-Id: <20211215011557.399940-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2021-12-15 01:15:54 +00:00 committed by Paolo Bonzini
parent fcb732d8f8
commit 83b83a0207
1 changed files with 2 additions and 7 deletions
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9
arch/x86/kvm/mmu/tdp_mmu.c
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@ -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,