util/async: Only call icount_notify_exit() if icount is enabled

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20231208113529.74067-6-philmd@linaro.org>

accel/tcg/icount-common.c

@@ -495,7 +495,9 @@ bool icount_configure(QemuOpts *opts, Error **errp)
 
 void icount_notify_exit(void)
 {
-    if (icount_enabled() && current_cpu) {
+    assert(icount_enabled());
+
+    if (current_cpu) {
         qemu_cpu_kick(current_cpu);
         qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
     }

stubs/icount.c

@@ -45,7 +45,7 @@ void icount_account_warp_timer(void)
 {
     abort();
 }
-
 void icount_notify_exit(void)
 {
+    abort();
 }

util/async.c

@@ -94,13 +94,15 @@ static void aio_bh_enqueue(QEMUBH *bh, unsigned new_flags)
     }
 
     aio_notify(ctx);
-    /*
-     * Workaround for record/replay.
-     * vCPU execution should be suspended when new BH is set.
-     * This is needed to avoid guest timeouts caused
-     * by the long cycles of the execution.
-     */
-    icount_notify_exit();
+    if (unlikely(icount_enabled())) {
+        /*
+         * Workaround for record/replay.
+         * vCPU execution should be suspended when new BH is set.
+         * This is needed to avoid guest timeouts caused
+         * by the long cycles of the execution.
+         */
+        icount_notify_exit();
+    }
 }
 
 /* Only called from aio_bh_poll() and aio_ctx_finalize() */