Changeset 8861 in vbox for trunk/src/VBox/VMM

Timestamp:

May 15, 2008 2:57:35 PM (17 years ago)

Author:

vboxsync

Message:

Don't bother to invalidate pages if a TLB flush is already pending.

File:

• trunk/src/VBox/VMM/VMMR0/HWSVMR0.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMR0/HWSVMR0.cpp

@@ -1724 +1724 @@
 HWACCMR0DECL(int) SVMR0InvalidatePage(PVM pVM, RTGCPTR GCVirt)
 {
-    SVM_VMCB   *pVMCB;
-
-    Log2(("SVMR0InvalidatePage %VGv\n", GCVirt));
-    AssertReturn(pVM, VERR_INVALID_PARAMETER);
-    Assert(pVM->hwaccm.s.svm.fSupported);
-
-    pVMCB = (SVM_VMCB *)pVM->hwaccm.s.svm.pVMCB;
-    AssertMsgReturn(pVMCB, ("Invalid pVMCB\n"), VERR_EM_INTERNAL_ERROR);
-
-    STAM_COUNTER_INC(&pVM->hwaccm.s.StatFlushPageManual);
-    SVMInvlpgA(GCVirt, pVMCB->ctrl.TLBCtrl.n.u32ASID);
+    /* Skip it if a TLB flush is already pending. */
+    if (pVM->hwaccm.s.svm.fForceTLBFlush)
+    {
+        SVM_VMCB   *pVMCB;
+
+        Log2(("SVMR0InvalidatePage %VGv\n", GCVirt));
+        AssertReturn(pVM, VERR_INVALID_PARAMETER);
+        Assert(pVM->hwaccm.s.svm.fSupported);
+
+        pVMCB = (SVM_VMCB *)pVM->hwaccm.s.svm.pVMCB;
+        AssertMsgReturn(pVMCB, ("Invalid pVMCB\n"), VERR_EM_INTERNAL_ERROR);
+
+        STAM_COUNTER_INC(&pVM->hwaccm.s.StatFlushPageManual);
+        SVMInvlpgA(GCVirt, pVMCB->ctrl.TLBCtrl.n.u32ASID);
+    }
     return VINF_SUCCESS;
 }