Changeset 22609 in vbox for trunk/src/VBox/Main/HostImpl.cpp

Timestamp:

Aug 31, 2009 2:34:02 PM (15 years ago)

Author:

vboxsync

Message:

disable VT-x on Linux < 2.6.13

File:

• trunk/src/VBox/Main/HostImpl.cpp (modified) (1 diff)

trunk/src/VBox/Main/HostImpl.cpp

@@ -235 +235 @@
                  && (u32FeaturesEDX & X86_CPUID_FEATURE_EDX_FXSR)
                )
+            {
+#ifdef RT_OS_LINUX
+                /* Linux: VT-x is not supported on Linux < 2.6.13 because older kernels
+                 * unconditionally disable the VMXE flag */
+                char szBuf[64];
+                int rc = RTSystemQueryOSInfo(RTSYSOSINFO_RELEASE, szBuf, sizeof(szBuf));
+
+                if (RT_SUCCESS(rc))
+                {
+                    char *pszNext;
+                    uint32_t uA, uB, uC;
+
+                    rc = RTStrToUInt32Ex(szBuf, &pszNext, 10, &uA);
+                    if (   RT_SUCCESS(rc)
+                        && *pszNext == '.')
+                    {
+                        rc = RTStrToUInt32Ex(pszNext+1, &pszNext, 10, &uB);
+                        if (   RT_SUCCESS(rc)
+                            && *pszNext == '.')
+                        {
+                            rc = RTStrToUInt32Ex(pszNext+1, &pszNext, 10, &uC);
+                            if (RT_SUCCESS(rc))
+                            {
+                                uint32_t uLinuxVersion = (uA << 16) + (uB << 8) + uC;
+                                if (uLinuxVersion >= (2 << 16) + (6 << 8) + 13)
+                                    fVTxAMDVSupported = true;
+                            }
+                        }
+                    }
+                }
+#else
                 fVTxAMDVSupported = true;
+#endif
+            }
         }
         else