diff options
| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2020-03-20 14:28:30 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-04-21 09:12:58 -0400 |
| commit | 9805c5f74b8a65da397ec6b70734e44f1f191c0b (patch) | |
| tree | 53a2ca06ff65e8d2abbdc1f88ec7d5284e6d76c1 /arch/x86/kvm/vmx/nested.c | |
| parent | 41fab65e7c44ab1c3aa4b962e6f95649354db419 (diff) | |
KVM: nVMX: Don't flush TLB on nested VMX transition
Unconditionally skip the TLB flush triggered when reusing a root for a
nested transition as nested_vmx_transition_tlb_flush() ensures the TLB
is flushed when needed, regardless of whether the MMU can reuse a cached
root (or the last root).
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200320212833.3507-35-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx/nested.c')
| -rw-r--r-- | arch/x86/kvm/vmx/nested.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index a8290954caa7..237e2e32a659 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -1143,10 +1143,12 @@ static int nested_vmx_load_cr3(struct kvm_vcpu *vcpu, unsigned long cr3, bool ne } /* - * See nested_vmx_transition_mmu_sync for details on skipping the MMU sync. + * Unconditionally skip the TLB flush on fast CR3 switch, all TLB + * flushes are handled by nested_vmx_transition_tlb_flush(). See + * nested_vmx_transition_mmu_sync for details on skipping the MMU sync. */ if (!nested_ept) - kvm_mmu_new_cr3(vcpu, cr3, false, + kvm_mmu_new_cr3(vcpu, cr3, true, !nested_vmx_transition_mmu_sync(vcpu)); vcpu->arch.cr3 = cr3; |