Changeset 56823 in vbox for trunk/src/VBox/VMM/VMMR0

Timestamp:

Jul 6, 2015 4:45:43 PM (9 years ago)

Author:

vboxsync

Message:

VMM/HMVMXR0: Check for MSR-bitmap feature being available before using it.

File:

• trunk/src/VBox/VMM/VMMR0/HMVMXR0.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMR0/HMVMXR0.cpp

@@ -4843 +4843 @@
 
                 /* We need to intercept reads too, see @bugref{7386} comment #16. */
-                hmR0VmxSetMsrPermission(pVCpu, MSR_K6_EFER, VMXMSREXIT_INTERCEPT_READ, VMXMSREXIT_INTERCEPT_WRITE);
+                if (pVM->hm.s.vmx.Msrs.VmxProcCtls.n.allowed1 & VMX_VMCS_CTRL_PROC_EXEC_USE_MSR_BITMAPS)
+                    hmR0VmxSetMsrPermission(pVCpu, MSR_K6_EFER, VMXMSREXIT_INTERCEPT_READ, VMXMSREXIT_INTERCEPT_WRITE);
                 Log4(("Load[%RU32]: MSR[--]: u32Msr=%#RX32 u64Value=%#RX64 cMsrs=%u\n", pVCpu->idCpu, MSR_K6_EFER,
                       pMixedCtx->msrEFER, pVCpu->hm.s.vmx.cMsrs));