Changeset 1054 in vbox

Timestamp:

Feb 23, 2007 5:42:22 PM (18 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

18930

Message:

Check for some power feature in 0x8000007 eax:8 like linux does.

File:

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

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

@@ -4079 +4079 @@
                 && (uEDX & BIT(27) /*RDTSCP*/))
             {
-                /** @todo when we get the model / family numbers of barcelona and other amd cores with proper TSC,
-                 * add the appropriate model checks here. */
-                return SUPGIPMODE_ASYNC_TSC;
+                /* Check the power specs for <check the docs what this actually is>. */
+                ASMCpuId(0x80000000, &uEAX, &uEBX, &uECX, &uEDX);
+                if (uEAX < 0x80000007)
+                    return SUPGIPMODE_ASYNC_TSC;
+                ASMCpuId(0x80000007, &uEAX, &uEBX, &uECX, &uEDX);
+                if (!(uEDX & BIT(8)))
+                    return SUPGIPMODE_ASYNC_TSC;
             }
         }