Changeset 53506 in vbox for trunk

Timestamp:

Dec 11, 2014 10:16:51 AM (10 years ago)

Author:

vboxsync

Message:

HostDrivers/support: paranoia.

File:

• trunk/src/VBox/HostDrivers/Support/SUPDrv.c (modified) (1 diff)

trunk/src/VBox/HostDrivers/Support/SUPDrv.c

@@ -5625 +5625 @@
     if (!s_fQueried)
     {
-        uint32_t uEax, uEbx, uEcx, uEdx;
-        ASMCpuId(0x80000000, &uEax, &uEbx, &uEcx, &uEdx);
-        if (uEax >= 0x80000007)
-        {
-            ASMCpuId(0x80000007, &uEax, &uEbx, &uEcx, &uEdx);
-            if (uEdx & X86_CPUID_AMD_ADVPOWER_EDX_TSCINVAR)
-                s_fIsInvariantTsc = true;
+        if (ASMHasCpuId())
+        {
+            uint32_t uEax, uEbx, uEcx, uEdx;
+            ASMCpuId(0x80000000, &uEax, &uEbx, &uEcx, &uEdx);
+            if (uEax >= 0x80000007)
+            {
+                ASMCpuId(0x80000007, &uEax, &uEbx, &uEcx, &uEdx);
+                if (uEdx & X86_CPUID_AMD_ADVPOWER_EDX_TSCINVAR)
+                    s_fIsInvariantTsc = true;
+            }
         }
         s_fQueried = true;