CR4.TSD flag support (Matt Schulkind)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1556 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 4 insertions, 1 deletions

diff --git a/target-i386/helper.c b/target-i386/helper.c
index c41cbb7278..424dc52848 100644
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -2328,7 +2328,10 @@ void helper_invlpg(target_ulong addr)
 void helper_rdtsc(void)
 {
     uint64_t val;
-    
+
+    if ((env->cr[4] & CR4_TSD_MASK) && ((env->hflags & HF_CPL_MASK) != 0)) {
+        raise_exception(EXCP0D_GPF);
+    }
     val = cpu_get_tsc(env);
     EAX = (uint32_t)(val);
     EDX = (uint32_t)(val >> 32);