Changeset 79804 in vbox for trunk/src/VBox

Timestamp:

Jul 16, 2019 9:55:32 AM (5 years ago)

Author:

vboxsync

Message:

VMM/CPUM: Nested VMX: bugref:9180 Fix determining the VMX max physical address width (reported in IA32_VMX_BASIC MSR). It's derived from long mode (whether the guest is a 64-bit capable CPU or not) and if we clear/change it, we adjust this as well.

File:

• trunk/src/VBox/VMM/VMMR3/CPUMR3CpuId.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/VMMR3/CPUMR3CpuId.cpp

@@ -4752 +4752 @@
             pVM->cpum.s.aGuestCpuIdPatmExt[1].uEdx = pLeaf->uEdx |= X86_CPUID_EXT_FEATURE_EDX_LONG_MODE;
             pVM->cpum.s.GuestFeatures.fLongMode = 1;
+            pVM->cpum.s.GuestFeatures.cVmxMaxPhysAddrWidth = pVM->cpum.s.GuestFeatures.cMaxPhysAddrWidth;
             LogRel(("CPUM: SetGuestCpuIdFeature: Enabled LONG MODE\n"));
             break;
@@ -5071 +5072 @@
                 pVM->cpum.s.aGuestCpuIdPatmExt[1].uEdx = pLeaf->uEdx &= ~X86_CPUID_EXT_FEATURE_EDX_LONG_MODE;
             pVM->cpum.s.GuestFeatures.fLongMode = 0;
+            pVM->cpum.s.GuestFeatures.cVmxMaxPhysAddrWidth = 32;
             break;