Changeset 36639 in vbox for trunk/src/VBox/VMM/VMMAll/CPUMAllRegs.cpp

Timestamp:

Apr 11, 2011 10:10:38 AM (14 years ago)

Author:

vboxsync

Message:

CPUMIsGuestInRealOrV86Mode and CPUMIsGuestInRealOrV86ModeEx.

File:

• trunk/src/VBox/VMM/VMMAll/CPUMAllRegs.cpp (modified) (2 diffs)

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

@@ -870 +870 @@
 
             if ((pVCpu->CTX_SUFF(pVM)->cpum.s.aGuestCpuIdStd[1].ecx & X86_CPUID_FEATURE_ECX_MONITOR) != 0)
-                
+
                 *puValue |= MSR_IA32_MISC_ENABLE_MONITOR /* if mwait/monitor available */;
             /** @todo: add more cpuid-controlled features this way. */
@@ -2059 +2059 @@
 
 /**
+ * Tests if the guest is running in real or virtual 8086 mode.
+ *
+ * @returns @c true if it is, @c false if not.
+ * @param   pVCpu       The virtual CPU handle.
+ */
+VMMDECL(bool) CPUMIsGuestInRealOrV86Mode(PVMCPU pVCpu)
+{
+    return !(pVCpu->cpum.s.Guest.cr0 & X86_CR0_PE)
+        || pVCpu->cpum.s.Guest.eflags.Bits.u1VM; /** @todo verify that this cannot be set in long mode. */
+}
+
+
+/**
  * Tests if the guest is running in protected or not.
  *