Changeset 7644 in vbox for trunk/src/VBox/VMM/VMMAll

Timestamp:

Mar 31, 2008 11:01:34 AM (17 years ago)

Author:

vboxsync

Message:

Added CPUMCPUIDFEATURE_PAE

File:

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

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

@@ -1018 +1018 @@
         }
 
+        /*
+         * Set the PAE bit in both feature masks.
+         * Assumes the caller knows what it's doing! (host must support these)
+         */
+        case CPUMCPUIDFEATURE_PAE:
+        {
+            uint32_t ulEdx, ulDummy;
+
+            ASMCpuId(1, &ulDummy, &ulDummy, &ulDummy, &ulEdx);
+            if (!(ulEdx & X86_CPUID_FEATURE_EDX_PAE))
+            {
+                AssertMsgFailed(("ERROR: Can't turn on PAE when the host doesn't support it!!\n"));
+                return;
+            }
+
+            if (pVM->cpum.s.aGuestCpuIdStd[0].eax >= 1)
+                pVM->cpum.s.aGuestCpuIdStd[1].edx |= X86_CPUID_FEATURE_EDX_PAE;
+            if (    pVM->cpum.s.aGuestCpuIdExt[0].eax >= 0x80000001
+                &&  pVM->cpum.s.aGuestCpuIdExt[1].edx)
+                pVM->cpum.s.aGuestCpuIdExt[1].edx |= X86_CPUID_AMD_FEATURE_EDX_PAE;
+            Log(("CPUMSetGuestCpuIdFeature: Enabled PAE\n"));
+            break;
+        }
+
         default:
             AssertMsgFailed(("enmFeature=%d\n", enmFeature));