Changeset 56618 in vbox

Timestamp:

Jun 24, 2015 12:12:41 PM (9 years ago)

Author:

vboxsync

Message:

VMM/HMR0: Don't read MSR unnecessarily.

File:

• trunk/src/VBox/VMM/VMMR0/HMR0.cpp (modified) (3 diffs)

trunk/src/VBox/VMM/VMMR0/HMR0.cpp

@@ -344 +344 @@
     {
         /** @todo move this into a separate function. */
-        g_HmR0.vmx.Msrs.u64FeatureCtrl = ASMRdMsr(MSR_IA32_FEATURE_CONTROL);
-
         /*
          * First try use native kernel API for controlling VT-x.
@@ -374 +372 @@
         if (RT_SUCCESS(g_HmR0.lLastError))
         {
-            /* Reread in case it was changed by hmR0InitIntelCpu(). */
-            g_HmR0.vmx.Msrs.u64FeatureCtrl = ASMRdMsr(MSR_IA32_FEATURE_CONTROL);
-
             /*
              * Read all relevant registers and MSRs.
@@ -382 +377 @@
             g_HmR0.vmx.u64HostCr4          = ASMGetCR4();
             g_HmR0.vmx.u64HostEfer         = ASMRdMsr(MSR_K6_EFER);
+            g_HmR0.vmx.Msrs.u64FeatureCtrl = ASMRdMsr(MSR_IA32_FEATURE_CONTROL);
             g_HmR0.vmx.Msrs.u64BasicInfo   = ASMRdMsr(MSR_IA32_VMX_BASIC_INFO);
             g_HmR0.vmx.Msrs.VmxPinCtls.u   = ASMRdMsr(MSR_IA32_VMX_PINBASED_CTLS);