Changeset 26662 in vbox for trunk/src/VBox/VMM

Timestamp:

Feb 19, 2010 3:11:13 PM (15 years ago)

Author:

vboxsync

Message:

VMM: conditionally expose MWAIT extensions

File:

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

trunk/src/VBox/VMM/CPUM.cpp

@@ -621 +621 @@
 
     pCPUM->aGuestCpuIdStd[5].ecx = pCPUM->aGuestCpuIdStd[5].edx = 0;
+    /** @cfgm{/CPUM/MWaitExtensions, boolean, false}
+     * Expose MWAIT extended features to the guest.
+     * For now we expose just MWAIT break on interrupt feature (bit 1)
+     */
+    bool fMWaitExtensions;
+    rc = CFGMR3QueryBoolDef(pCpumCfg, "MWaitExtensions", &fMWaitExtensions, false); AssertRCReturn(rc, rc);
+    if (fMWaitExtensions)
+        pCPUM->aGuestCpuIdStd[5].ecx = 3;
 
     /*