Changeset 3301 in vbox

Timestamp:

Jun 26, 2007 3:35:26 PM (18 years ago)

Author:

vboxsync

Message:

Update the MSR_IA32_FEATURE_CONTROL MSR ourselves if it's not locked.

File:

• trunk/src/VBox/VMM/VMMR0/HWACCMR0.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMR0/HWACCMR0.cpp

@@ -98 +98 @@
                  * Once the lock bit is set, this MSR can no longer be modified.
                  */
+                if (!(pVM->hwaccm.s.vmx.msr.feature_ctrl & (MSR_IA32_FEATURE_CONTROL_VMXON|MSR_IA32_FEATURE_CONTROL_LOCK)))
+                {
+                    /* MSR is not yet locked; we can change it ourselves here */
+                    pVM->hwaccm.s.vmx.msr.feature_ctrl |= (MSR_IA32_FEATURE_CONTROL_VMXON|MSR_IA32_FEATURE_CONTROL_LOCK);
+                    ASMWrMsr(MSR_IA32_FEATURE_CONTROL, pVM->hwaccm.s.vmx.msr.feature_ctrl);
+                }
+
                 if (   (pVM->hwaccm.s.vmx.msr.feature_ctrl & (MSR_IA32_FEATURE_CONTROL_VMXON|MSR_IA32_FEATURE_CONTROL_LOCK))
                                                           == (MSR_IA32_FEATURE_CONTROL_VMXON|MSR_IA32_FEATURE_CONTROL_LOCK))