Changeset 26651 in vbox for trunk

Timestamp:

Feb 19, 2010 1:48:01 PM (15 years ago)

Author:

vboxsync

Message:

Check for raw mode cpuid workaround during relocation.

File:

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

trunk/src/VBox/VMM/CPUM.cpp

@@ -817 +817 @@
         pVCpu->cpum.s.pHyperCoreRC = MMHyperCCToRC(pVM, pVCpu->cpum.s.pHyperCoreR3);
         Assert(pVCpu->cpum.s.pHyperCoreRC != NIL_RTRCPTR);
+
+        /*
+         * Workaround for missing cpuid(0) patches when leaf 4 returns GuestCpuIdDef:
+         * If we miss to patch a cpuid(0).eax then Linux tries to determine the number
+         * of processors from (cpuid(4).eax >> 26) + 1.
+         */
+        if (!HWACCMR3IsAllowed(pVM))
+            pCPUM->aGuestCpuIdStd[4].eax = 0;
     }
 }