optional support for kernel code virtualization

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1753 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 10 insertions, 0 deletions

diff --git a/cpu-exec.c b/cpu-exec.c
index 1ec49c2d6a..3bf4b370a4 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -627,6 +627,9 @@ int cpu_exec(CPUState *env1)
                    jump. */
                 {
                     if (T0 != 0 &&
+#if USE_KQEMU
+                        (env->kqemu_enabled != 2) &&
+#endif
                         tb->page_addr[1] == -1
 #if defined(TARGET_I386) && defined(USE_CODE_COPY)
                     && (tb->cflags & CF_CODE_COPY) == 
@@ -756,6 +759,13 @@ int cpu_exec(CPUState *env1)
                     T0 = 0;
                 }
 #endif
+#if defined(USE_KQEMU)
+#define MIN_CYCLE_BEFORE_SWITCH (100 * 1000)
+                if (kqemu_is_ok(env) &&
+                    (cpu_get_time_fast() - env->last_io_time) >= MIN_CYCLE_BEFORE_SWITCH) {
+                    cpu_loop_exit();
+                }
+#endif
             }
         } else {
             env_to_regs();