accel/tcg: Split out tb_flush__exclusive_or_serial

Expose a routine to be called when no cpus are running.
Simplify the do_tb_flush run_on_cpu callback, because
that is explicitly called with start_exclusive; there
is no need for the mmap_lock as well.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/exec/tb-flush.h b/include/exec/tb-flush.h
index 142c240d94..090ffc8818 100644
--- a/include/exec/tb-flush.h
+++ b/include/exec/tb-flush.h
@@ -9,6 +9,21 @@
 #define _TB_FLUSH_H_
 
 /**
+ * tb_flush__exclusive_or_serial()
+ *
+ * Used to flush all the translation blocks in the system.  Mostly this is
+ * used to empty the code generation buffer after it is full.  Sometimes it
+ * is used when it is simpler to flush everything than work out which
+ * individual translations are now invalid.
+ *
+ * Must be called from an exclusive or serial context, e.g. start_exclusive,
+ * vm_stop, or when there is only one vcpu.  Note that start_exclusive cannot
+ * be called from within the cpu run loop, so this cannot be called from
+ * within target code.
+ */
+void tb_flush__exclusive_or_serial(void);
+
+/**
  * tb_flush() - flush all translation blocks
  * @cs: CPUState (must be valid, but treated as anonymous pointer)
  *