While at it, add an assertion in tb_flush to check for tb_lock
being held.
Signed-off-by: Emilio G. Cota <[email protected]>
---
translate-all.c | 40 +++++++++++-----------------------------
1 file changed, 11 insertions(+), 29 deletions(-)
diff --git a/translate-all.c b/translate-all.c
index f3f7fb2..378517d 100644
--- a/translate-all.c
+++ b/translate-all.c
@@ -869,30 +869,24 @@ static void page_flush_tb(void)
}
}
-#ifdef CONFIG_USER_ONLY
-void tb_flush_safe(CPUState *cpu)
+static void tb_flush_work(void *arg)
{
- tb_flush(cpu);
-}
-#else
-static void tb_flush_work(void *opaque)
-{
- CPUState *cpu = opaque;
- tb_flush(cpu);
-}
+ CPUState *cpu = arg;
-void tb_flush_safe(CPUState *cpu)
-{
+ /*
+ * Really no need to acquire tb_lock since all other threads are
+ * asleep; let's just acquire it to pass the assertion in
+ * tb_flush and for the wmb when unlocking.
+ */
+ tb_lock_nocheck();
tb_flush(cpu);
- async_run_safe_work_on_cpu(cpu, tb_flush_work, cpu);
+ tb_unlock();
}
-#endif
/* flush all the translation blocks */
-/* XXX: tb_flush is currently not thread safe */
void tb_flush(CPUState *cpu)
{
- tb_lock();
+ assert(have_tb_lock);
#if defined(DEBUG_FLUSH)
printf("qemu: flush code_size=%ld nb_tbs=%d avg_tb_size=%ld\n",
@@ -919,8 +913,6 @@ void tb_flush(CPUState *cpu)
/* XXX: flush processor icache at this point if cache flush is
expensive */
tcg_ctx.tb_ctx.tb_flush_count++;
-
- tb_unlock();
}
#ifdef DEBUG_TB_CHECK
@@ -1164,17 +1156,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
tb = tb_alloc(pc);
if (!tb) {
/* flush must be done */
-#ifdef CONFIG_USER_ONLY
- /* FIXME: kick all other CPUs out also for user-mode emulation. */
- tb_flush(cpu);
- mmap_unlock();
-#else
- tb_flush_safe(cpu);
-#endif
- cpu_loop_exit(cpu);
- tb_flush(cpu);
- /* cannot fail at this point */
- tb = tb_alloc(pc);
+ cpu_tcg_sched_work(cpu, tb_flush_work, cpu);
}
tb->tc_ptr = tcg_ctx.code_gen_ptr;
--
1.9.1
