From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,FROM_LOCAL_NOVOWEL, HEADER_FROM_DIFFERENT_DOMAINS,HK_RANDOM_FROM,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65315C433FF for ; Mon, 12 Aug 2019 22:09:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1C7CE206C2 for ; Mon, 12 Aug 2019 22:09:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="FEtwW4Hp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726200AbfHLWJR (ORCPT ); Mon, 12 Aug 2019 18:09:17 -0400 Received: from mail-lj1-f195.google.com ([209.85.208.195]:44655 "EHLO mail-lj1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726185AbfHLWJR (ORCPT ); Mon, 12 Aug 2019 18:09:17 -0400 Received: by mail-lj1-f195.google.com with SMTP id e24so3011574ljg.11 for ; Mon, 12 Aug 2019 15:09:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=jv4vjvon820rdz2/ZYNeWVdf9J0eLgu+Z1XIwQm8nz0=; b=FEtwW4Hpn9BaQfo1umVm9B1zGDFm7rTZiEdF8GZ1V60fH/qFKT8c7kJd5QZQ80uBCE kGKLu7KU3gZZgKx63Yy4xmb7sLjCJ77QpWA30bYbYI93Y4Sfif+BMncW494531ptSrPM F1mqBFxc3N/CT7VQO5pqE2H2wy2/s99zAewZuJNmzabck7O4Oi0Rftcr2+EyUB7OWJTk NWNoTWq8y3lXDRMokm1pyquc0G88QW6xQt3dYEv3NqDn5gwOZh/TzWHi2UU0eNLiu9aq XX6q5RrnxGwrn7qMZ7DaalXXYpvfRuHLjyBVOTySSo4B7m7uGgR7fezp/YFRi8Q35OOK ZliQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=jv4vjvon820rdz2/ZYNeWVdf9J0eLgu+Z1XIwQm8nz0=; b=Zrhr6uMP8h/HcaJ+dzXla1rdEcI/ECZMiJz2SH8QD2VzSi4c7+x647RNNo4Mj7rTr9 m84spanlwKCfGn8dsr1W+/FHkQZtsQAHYJRGRlF8XepY5htjy1P90xYqfmwr0OtsAGe2 NSOXbS7Pe4Aytq1BXcpfZIO3PnjI1LdvqKzbmGEA7qLWjnbLyk0Us4XE+7/k0yIxGaSx 4cKaq9kKMdAdRl1rFzBo/5v8z8/YzYojzsz8tdjRsUH60b1rOEnUpZ0L9DWla3SpXYZe G7XNdbp1XoRrwnihHSJv8TxbwORlCD6kCPSdUlxkGd0v+tdV6CAepwQ6/qYN8c/ZxTyK SkDg== X-Gm-Message-State: APjAAAUB+ePlLYdlJ0FQhdE/FY5lMxCMn9zZI2bwlkbhiT2k9mhVrTx0 NaKRLD77H9lpASukvkUwXeA= X-Google-Smtp-Source: APXvYqxYVcpJ35sgtJAE0YpfqL1T+98suH53WOw2dlocdGYxbAWmBtorbCl6O8OuWxnboMZVKCfuLw== X-Received: by 2002:a2e:29cb:: with SMTP id p72mr5959711ljp.31.1565647755438; Mon, 12 Aug 2019 15:09:15 -0700 (PDT) Received: from octofox.cadence.com (jcmvbkbc-1-pt.tunnel.tserv24.sto1.ipv6.he.net. [2001:470:27:1fa::2]) by smtp.gmail.com with ESMTPSA id a13sm19452468lfi.57.2019.08.12.15.09.12 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 12 Aug 2019 15:09:13 -0700 (PDT) From: Max Filippov To: linux-xtensa@linux-xtensa.org Cc: Chris Zankel , Max Filippov , stable@vger.kernel.org Subject: [PATCH] xtensa: add missing isync to the cpu_reset TLB code Date: Mon, 12 Aug 2019 15:08:47 -0700 Message-Id: <20190812220847.14624-1-jcmvbkbc@gmail.com> X-Mailer: git-send-email 2.11.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org ITLB entry modifications must be followed by the isync instruction before the new entries are possibly used. cpu_reset lacks one isync between ITLB way 6 initialization and jump to the identity mapping. Add missing isync to xtensa cpu_reset. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov --- arch/xtensa/kernel/setup.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c index 5cb8a62e091c..7c3106093c75 100644 --- a/arch/xtensa/kernel/setup.c +++ b/arch/xtensa/kernel/setup.c @@ -511,6 +511,7 @@ void cpu_reset(void) "add %2, %2, %7\n\t" "addi %0, %0, -1\n\t" "bnez %0, 1b\n\t" + "isync\n\t" /* Jump to identity mapping */ "jx %3\n" "2:\n\t" -- 2.11.0