From patchwork Mon Sep 13 12:19:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen Huang X-Patchwork-Id: 12488653 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=-12.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 27904C433EF for ; Mon, 13 Sep 2021 12:11:43 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E76D460FBF for ; Mon, 13 Sep 2021 12:11:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org E76D460FBF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=nA8alP6Svcha4oVOxqr6nv6z8Gp+r930rCs0vi/ANxI=; b=SgDVwon9KpotH9 8km5My06hBkb3OpU1LGJ7RjjZXjC/uJDxzIPWXD8IahDizhClOj3Am0kr8w5Um294bIvNiL3OFJP5 ODiG/jn7+5hTHjPzg9/CA6GUZq0NXTAQltPZRhFMkuiAITaBF96rD/tdqz0k4pCXJERnu1u0uWF68 5OzWcIZNXuYBUU3K9rQnYWSgnr/vn3tEuorhmF1PUmLJb2Q+Xc8TrqS/rFZ+jxUZtx1qQCNJUZdAw 4opNmujzs+hCJJh7/b/Cb4u/6JGnGV52XdWudfnJr0rH5UCwfZeNuV1RMDyqhpC6Gk0QMSRDnRykK Efm9lAVoZjccv+cYMECg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mPko4-001Xwp-Oe; Mon, 13 Sep 2021 12:11:28 +0000 Received: from szxga01-in.huawei.com ([45.249.212.187]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mPknz-001Xtb-71 for linux-riscv@lists.infradead.org; Mon, 13 Sep 2021 12:11:25 +0000 Received: from dggemv704-chm.china.huawei.com (unknown [172.30.72.57]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4H7QFp6K86zbmT8; Mon, 13 Sep 2021 20:07:10 +0800 (CST) Received: from dggema756-chm.china.huawei.com (10.1.198.198) by dggemv704-chm.china.huawei.com (10.3.19.47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2308.8; Mon, 13 Sep 2021 20:11:15 +0800 Received: from localhost.localdomain (10.175.112.125) by dggema756-chm.china.huawei.com (10.1.198.198) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.8; Mon, 13 Sep 2021 20:11:15 +0800 From: Chen Huang To: Paul Walmsley , Palmer Dabbelt , Albert Ou CC: Chen Huang , Kefeng Wang , , Subject: [PATCH 0/2] riscv: improve unaligned memory accesses Date: Mon, 13 Sep 2021 12:19:54 +0000 Message-ID: <20210913121956.1776656-1-chenhuang5@huawei.com> X-Mailer: git-send-email 2.18.0.huawei.25 MIME-Version: 1.0 X-Originating-IP: [10.175.112.125] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggema756-chm.china.huawei.com (10.1.198.198) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210913_051123_487203_E8327AE9 X-CRM114-Status: UNSURE ( 5.42 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org The RISCV ISA can support unaligned memory accesses, so the patchset selects HAVE_EFFICIENT_UNALIGNED_ACCESS and supports DCACHE_WORD_ACCESS to improve the efficiency of unaligned memory accesses. Chen Huang (2): riscv: Kconfig: select HAVE_EFFICIENT_UNALIGNED_ACCESS riscv: Support DCACHE_WORD_ACCESS arch/riscv/Kconfig | 2 ++ arch/riscv/include/asm/word-at-a-time.h | 36 +++++++++++++++++++++++++ 2 files changed, 38 insertions(+)