Changeset 10661 in vbox for trunk/src/VBox/VMM/VMMAll

Timestamp:

Jul 15, 2008 2:21:04 PM (17 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

33371

Message:

Reduce the number of world switches caused by cr8 writes by checking if we really need to be notified. (only when
an interrupt is pending and masked by the TRP value)

Location:

trunk/src/VBox/VMM/VMMAll

Files:

• EMAll.cpp (modified) (1 diff)
• PDMAll.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/VMMAll/EMAll.cpp

@@ -1726 +1726 @@
     {
         val64 = 0;
-        rc = PDMApicGetTPR(pVM, (uint8_t *)&val64);
+        rc = PDMApicGetTPR(pVM, (uint8_t *)&val64, NULL);
         AssertMsgRCReturn(rc, ("PDMApicGetTPR failed\n"), VERR_EM_INTERPRETER);
     }

trunk/src/VBox/VMM/VMMAll/PDMAll.cpp

@@ -230 +230 @@
 
 /**
- * Get the TPR (task priority register?).
+ * Get the TPR (task priority register).
  *
  * @returns The current TPR.
  * @param   pVM             VM handle.
  * @param   pu8TPR          Where to store the TRP.
- */
-PDMDECL(int) PDMApicGetTPR(PVM pVM, uint8_t *pu8TPR)
+ * @param   pfPending       Pending interrupt state (out).
+*/
+PDMDECL(int) PDMApicGetTPR(PVM pVM, uint8_t *pu8TPR, bool *pfPending)
 {
     if (pVM->pdm.s.Apic.CTXALLSUFF(pDevIns))
@@ -243 +244 @@
         pdmLock(pVM);
         *pu8TPR = pVM->pdm.s.Apic.CTXALLSUFF(pfnGetTPR)(pVM->pdm.s.Apic.CTXALLSUFF(pDevIns));
+        if (pfPending)
+            *pfPending = pVM->pdm.s.Apic.CTXALLSUFF(pfnHasPendingIrq)(pVM->pdm.s.Apic.CTXALLSUFF(pDevIns));
         pdmUnlock(pVM);
         return VINF_SUCCESS;