[v3,15/37] KVM: VMX: Clean up vmx_flush_tlb_gva()
diff mbox series

Message ID 20200320212833.3507-16-sean.j.christopherson@intel.com
State New
Headers show
  • KVM: x86: TLB flushing fixes and enhancements
Related show

Commit Message

Sean Christopherson March 20, 2020, 9:28 p.m. UTC
Refactor vmx_flush_tlb_gva() to remove a superfluous local variable and
clean up its comment, which is oddly located below the code it is

No functional change intended.

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
 arch/x86/kvm/vmx/vmx.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff mbox series

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 57c1cee58d18..43c0d4706f9a 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -2851,15 +2851,11 @@  static void exit_lmode(struct kvm_vcpu *vcpu)
 static void vmx_flush_tlb_gva(struct kvm_vcpu *vcpu, gva_t addr)
-	int vpid = to_vmx(vcpu)->vpid;
-	vpid_sync_vcpu_addr(vpid, addr);
-	 * If VPIDs are not supported or enabled, then the above is a no-op.
-	 * But we don't really need a TLB flush in that case anyway, because
-	 * each VM entry/exit includes an implicit flush when VPID is 0.
+	 * vpid_sync_vcpu_addr() is a nop if vmx->vpid==0, see the comment in
+	 * vmx_flush_tlb_guest() for an explanation of why this is ok.
+	vpid_sync_vcpu_addr(to_vmx(vcpu)->vpid, addr);
 static void vmx_flush_tlb_guest(struct kvm_vcpu *vcpu)