Changeset 54697 in vbox for trunk/src/VBox/VMM/VMMR3

Timestamp:

Mar 9, 2015 1:33:22 PM (10 years ago)

Author:

vboxsync

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

98854

Message:

VMM/TM: TMR3CpuTickIsFixedRateMonotonic() for now.

File:

• trunk/src/VBox/VMM/VMMR3/TM.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/VMMR3/TM.cpp

@@ -3200 +3200 @@
 
 
-#if 0
-/**
- * Check whether the host TSC is fixed rate & monotonic.
+/**
+ * Check whether the guest can be presented a fixed rate & monotonic TSC.
  *
  * @returns true if TSC is stable, false otherwise.
@@ -3213 +3212 @@
 VMMR3_INT_DECL(bool) TMR3CpuTickIsFixedRateMonotonic(PVM pVM, bool fWithParavirtEnabled)
 {
-    /** @todo */
-}
-#endif
+    /** @todo figure out what exactly we want here later. */
+    NOREF(fWithParavirtEnabled);
+    return (   tmR3HasFixedTSC(pVM)                                        /* Host has fixed-rate TSC. */
+            && g_pSUPGlobalInfoPage->u32Mode != SUPGIPMODE_ASYNC_TSC);     /* GIP thinks it's monotonic. */
+}