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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 AE108C43381 for ; Fri, 22 Mar 2019 11:29:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 71E522183E for ; Fri, 22 Mar 2019 11:29:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553254145; bh=5CEdWi3+IJoVbesMIIZBD0SNwxHswr6V8G83JVlygqw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=P0QmynkLO4/Dps2dSgHUo9nq3WPWRtLNLJPNXkbUAcYewlXu/Hcv8VaC43YqWJaVh v3bpuCa52SH934xtr7FTuFD5wuYNdqm03pDNxIXlCe+4zMYxvrRoxPA3ugHN/vD2Vn zZ8wQnrCrh0SSnuPc77u7oHbKWwvMXlNNCa0P5lA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729757AbfCVL3E (ORCPT ); Fri, 22 Mar 2019 07:29:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:56862 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728859AbfCVL3B (ORCPT ); Fri, 22 Mar 2019 07:29:01 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 806E720449; Fri, 22 Mar 2019 11:29:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553254141; bh=5CEdWi3+IJoVbesMIIZBD0SNwxHswr6V8G83JVlygqw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VDn7b2eiYrzGney0UjFPX+JWjxEN3/1Ds6Fluuzwuy9O4kFA6PmME5C84OPNgJL9V KCh38vCTtjO5Hjf3i1uLmTbnbo1/5j1GYLUIRHUVwQl7tfqVr/2R56buuKD+lNrP3D 6EpiSfkfj1tgO1NBqw8FAC6hJWIDdY/DyTO2ql9Q= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Eugeniy Paltsev , Vineet Gupta Subject: [PATCH 4.4 028/230] ARCv2: Enable unaligned access in early ASM code Date: Fri, 22 Mar 2019 12:12:46 +0100 Message-Id: <20190322111238.661190525@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190322111236.796964179@linuxfoundation.org> References: <20190322111236.796964179@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eugeniy Paltsev commit 252f6e8eae909bc075a1b1e3b9efb095ae4c0b56 upstream. It is currently done in arc_init_IRQ() which might be too late considering gcc 7.3.1 onwards (GNU 2018.03) generates unaligned memory accesses by default Cc: stable@vger.kernel.org #4.4+ Signed-off-by: Eugeniy Paltsev Signed-off-by: Vineet Gupta [vgupta: rewrote changelog] Signed-off-by: Greg Kroah-Hartman --- arch/arc/kernel/head.S | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/arch/arc/kernel/head.S +++ b/arch/arc/kernel/head.S @@ -17,6 +17,7 @@ #include #include #include +#include .macro CPU_EARLY_SETUP @@ -47,6 +48,15 @@ sr r5, [ARC_REG_DC_CTRL] 1: + +#ifdef CONFIG_ISA_ARCV2 + ; Unaligned access is disabled at reset, so re-enable early as + ; gcc 7.3.1 (ARC GNU 2018.03) onwards generates unaligned access + ; by default + lr r5, [status32] + bset r5, r5, STATUS_AD_BIT + kflag r5 +#endif .endm .section .init.text, "ax",@progbits