From fdbc2b5722f6092e47181a947c90fd4bdcc1c121 Mon Sep 17 00:00:00 2001
From: Richard Henderson <rth@twiddle.net>
Date: Wed, 29 Jun 2016 22:12:55 -0700
Subject: tcg: Add EXCP_ATOMIC
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When we cannot emulate an atomic operation within a parallel
context, this exception allows us to stop the world and try
again in a serial context.

Reviewed-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 cpus.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'cpus.c')

diff --git a/cpus.c b/cpus.c
index 31204bb..cfd5cdc 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1497,6 +1497,8 @@ static void tcg_exec_all(void)
             if (r == EXCP_DEBUG) {
                 cpu_handle_guest_debug(cpu);
                 break;
+            } else if (r == EXCP_ATOMIC) {
+                cpu_exec_step_atomic(cpu);
             }
         } else if (cpu->stop || cpu->stopped) {
             if (cpu->unplug) {
-- 
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