[Qemu-devel] [RFC PATCH V7 16/19] translate-all: introduces tb_flush_safe.

[fred . konrad]

From: KONRAD Frederic <address@hidden>

tb_flush is not thread safe we definitely need to exit VCPUs to do that.
This introduces tb_flush_safe which just creates an async safe work which will
do a tb_flush later.

Signed-off-by: KONRAD Frederic <address@hidden>
---
 include/exec/exec-all.h |  1 +
 translate-all.c         | 15 +++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index e9512df..246df68 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -200,6 +200,7 @@ struct TBContext {
 
 void tb_free(TranslationBlock *tb);
 void tb_flush(CPUState *cpu);
+void tb_flush_safe(CPUState *cpu);
 void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr);
 
 #if defined(USE_DIRECT_JUMP)
diff --git a/translate-all.c b/translate-all.c
index fc5162a..7094bf0 100644
--- a/translate-all.c
+++ b/translate-all.c
@@ -818,6 +818,21 @@ static void page_flush_tb(void)
     }
 }
 
+static void tb_flush_work(void *opaque)
+{
+    CPUState *cpu = opaque;
+    tb_flush(cpu);
+}
+
+void tb_flush_safe(CPUState *cpu)
+{
+#if 0 /* !MTTCG */
+    tb_flush(cpu);
+#else
+    async_run_safe_work_on_cpu(cpu, tb_flush_work, cpu);
+#endif /* MTTCG */
+}
+
 /* flush all the translation blocks */
 /* XXX: tb_flush is currently not thread safe */
 void tb_flush(CPUState *cpu)
-- 
1.9.0