From patchwork Sun Aug 30 19:29:30 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Timothy Baldwin X-Patchwork-Id: 512258 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 50B401401E7 for ; Mon, 31 Aug 2015 05:30:01 +1000 (AEST) Received: from localhost ([::1]:60258 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZW8Ih-0007KR-Bs for incoming@patchwork.ozlabs.org; Sun, 30 Aug 2015 15:29:59 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40165) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZW8IQ-00073S-Cq for qemu-devel@nongnu.org; Sun, 30 Aug 2015 15:29:43 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZW8IL-0006oT-DI for qemu-devel@nongnu.org; Sun, 30 Aug 2015 15:29:42 -0400 Received: from avasout05.plus.net ([84.93.230.250]:48247) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZW8IL-0006n8-7C for qemu-devel@nongnu.org; Sun, 30 Aug 2015 15:29:37 -0400 Received: from bfg ([91.125.221.142]) by avasout05 with smtp id B7Vb1r00134wg3f017VcUr; Sun, 30 Aug 2015 20:29:36 +0100 X-CM-Score: 0.00 X-CNFS-Analysis: v=2.1 cv=M8SwUHEs c=1 sm=1 tr=0 a=B8B1NXs3UN6A/TokT3C32w==:117 a=B8B1NXs3UN6A/TokT3C32w==:17 a=0Bzu9jTXAAAA:8 a=FJhpQO9QAAAA:8 a=h_6DSLV0AAAA:8 a=uRRa74qj2VoA:10 a=VcY7qbDSByDx5YbBqYoA:9 Received: from tim by bfg with local (Exim 4.84) (envelope-from ) id 1ZW8II-0004fR-GE; Sun, 30 Aug 2015 20:29:34 +0100 From: Timothy E Baldwin To: qemu-devel@nongnu.org Date: Sun, 30 Aug 2015 20:29:30 +0100 Message-Id: <1440962970-17906-1-git-send-email-T.E.Baldwin99@members.leeds.ac.uk> X-Mailer: git-send-email 2.1.4 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x (no timestamps) [generic] X-Received-From: 84.93.230.250 Cc: riku.voipio@iki.fi, Timothy E Baldwin Subject: [Qemu-devel] [PATCH] linux-user: Implement ARM __kernel_memory_barrier X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Implemented ARM __kernel_memory_barrier using GCC/clang builtin __sync_synchronize(). Signed-off-by: Timothy Edward Baldwin --- linux-user/main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/linux-user/main.c b/linux-user/main.c index 2c9658e..f4b81b1 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -531,7 +531,7 @@ do_kernel_trap(CPUARMState *env) switch (env->regs[15]) { case 0xffff0fa0: /* __kernel_memory_barrier */ - /* ??? No-op. Will need to do better for SMP. */ + __sync_synchronize(); break; case 0xffff0fc0: /* __kernel_cmpxchg */ /* XXX: This only works between threads, not between processes.