diff options
| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2021-03-05 10:31:19 -0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-03-15 04:44:02 -0400 |
| commit | d0a2d45654c7b117236d8b276a6b8b8bf071e342 (patch) | |
| tree | 7b6737066120c185ddd6a7abef95b7aaf54b55be /arch/x86/kvm/vmx | |
| parent | cdbd4b40e70c63e15554120cf486194fd16cb905 (diff) | |
KVM: VMX: Don't invalidate hv_tlb_eptp if the new EPTP matches
Don't invalidate the common EPTP, and thus trigger rechecking of EPTPs
across all vCPUs, if the new EPTP matches the old/common EPTP. In all
likelihood this is a meaningless optimization, but there are (uncommon)
scenarios where KVM can reload the same EPTP.
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210305183123.3978098-8-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 2dc7e28bb8e5..fedc9be5e62c 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -3117,7 +3117,8 @@ static void vmx_load_mmu_pgd(struct kvm_vcpu *vcpu, hpa_t root_hpa, if (kvm_x86_ops.tlb_remote_flush) { spin_lock(&to_kvm_vmx(kvm)->ept_pointer_lock); to_vmx(vcpu)->ept_pointer = eptp; - to_kvm_vmx(kvm)->hv_tlb_eptp = INVALID_PAGE; + if (eptp != to_kvm_vmx(kvm)->hv_tlb_eptp) + to_kvm_vmx(kvm)->hv_tlb_eptp = INVALID_PAGE; spin_unlock(&to_kvm_vmx(kvm)->ept_pointer_lock); } |