Changeset 20679 in vbox for trunk/src/VBox/Main

Timestamp:

Jun 18, 2009 10:38:52 AM (16 years ago)

Author:

vboxsync

Message:

ACPI: fix problem with certain Windows ACPI impls (such as XP) mistreating CPU objects - make them all of the same size and control behavior entirely by patching

File:

• trunk/src/VBox/Main/ConsoleImpl2.cpp (modified) (2 diffs)

trunk/src/VBox/Main/ConsoleImpl2.cpp

@@ -661 +661 @@
     if (fACPI)
     {
+        BOOL fShowCpu = fExtProfile;
+        /* Always show the CPU leafs when we have multiple VCPUs or when the IO-APIC is enabled.
+         * The Windows SMP kernel needs a CPU leaf or else its idle loop will burn cpu cycles; the
+         * intelppm driver refuses to register an idle state handler.
+         */
+        if ((cCpus > 1) ||  fIOAPIC)
+            fShowCpu = true;
+         
         rc = CFGMR3InsertNode(pDevices, "acpi", &pDev);                             RC_CHECK();
         rc = CFGMR3InsertNode(pDev,     "0", &pInst);                               RC_CHECK();
@@ -678 +686 @@
 #endif
         rc = CFGMR3InsertInteger(pCfg,  "ShowRtc", fExtProfile);                    RC_CHECK();
-        rc = CFGMR3InsertInteger(pCfg,  "ShowCpu", fExtProfile);                    RC_CHECK();
+
+        rc = CFGMR3InsertInteger(pCfg,  "ShowCpu", fShowCpu);                       RC_CHECK();
         rc = CFGMR3InsertInteger(pInst, "PCIDeviceNo",          7);                 RC_CHECK();
         Assert(!afPciDeviceNo[7]);