diff options
| author | Ben Gardon <bgardon@google.com> | 2021-02-02 10:57:10 -0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-04 05:27:39 -0500 |
| commit | 734e45b329d626d2c14e2bcf8be3d069a33c3316 (patch) | |
| tree | 81a17c2fc51511327ebed2ee79d99f8629ab37a7 /arch/x86/kvm | |
| parent | 3a9a4aa5657471a02ffb7f9b7f3b7a468b3f257b (diff) | |
| download | linux-734e45b329d626d2c14e2bcf8be3d069a33c3316.tar.bz2 | |
KVM: x86/mmu: Don't redundantly clear TDP MMU pt memory
The KVM MMU caches already guarantee that shadow page table memory will
be zeroed, so there is no reason to re-zero the page in the TDP MMU page
fault handler.
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>
Message-Id: <20210202185734.1680553-5-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/mmu/tdp_mmu.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index 05e6e2c4554f..810de3280b97 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -655,7 +655,6 @@ int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code, sp = alloc_tdp_mmu_page(vcpu, iter.gfn, iter.level); list_add(&sp->link, &vcpu->kvm->arch.tdp_mmu_pages); child_pt = sp->spt; - clear_page(child_pt); new_spte = make_nonleaf_spte(child_pt, !shadow_accessed_mask); |