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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 ED7AAC433EF for ; Thu, 16 Sep 2021 13:00:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D4E2A61241 for ; Thu, 16 Sep 2021 13:00:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239845AbhIPNBn (ORCPT ); Thu, 16 Sep 2021 09:01:43 -0400 Received: from szxga03-in.huawei.com ([45.249.212.189]:16267 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239824AbhIPNBk (ORCPT ); Thu, 16 Sep 2021 09:01:40 -0400 Received: from dggemv711-chm.china.huawei.com (unknown [172.30.72.56]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4H9HH02GFrz8tCG; Thu, 16 Sep 2021 20:59:40 +0800 (CST) Received: from dggema756-chm.china.huawei.com (10.1.198.198) by dggemv711-chm.china.huawei.com (10.1.198.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2308.8; Thu, 16 Sep 2021 21:00:18 +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; Thu, 16 Sep 2021 21:00:18 +0800 From: Chen Huang To: Paul Walmsley , Palmer Dabbelt , Albert Ou CC: Chen Huang , Kefeng Wang , Darius Rad , Jisheng Zhang , , Subject: [PATCH v2 1/2] riscv: support HAVE_EFFICIENT_UNALIGNED_ACCESS Date: Thu, 16 Sep 2021 13:08:54 +0000 Message-ID: <20210916130855.4054926-2-chenhuang5@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210916130855.4054926-1-chenhuang5@huawei.com> References: <20210916130855.4054926-1-chenhuang5@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.112.125] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To dggema756-chm.china.huawei.com (10.1.198.198) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch selects HAVE_EFFICIENT_UNALIGNED_ACCESS. But the feature maybe not be implemented on some CPUs, or with inefficent implementation. So add a config CPU_HAS_NO_UNALIGNED, if the CPU don't want it, please select it. Signed-off-by: Chen Huang Signed-off-by: Kefeng Wang --- arch/riscv/Kconfig | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index aac669a6c3d8..cd0be39d4c08 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -81,6 +81,7 @@ config RISCV select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_CONTIGUOUS if MMU select HAVE_EBPF_JIT if MMU + select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_HAS_NO_UNALIGNED && MMU select HAVE_FUNCTION_ERROR_INJECTION select HAVE_FUTEX_CMPXCHG if FUTEX select HAVE_GCC_PLUGINS @@ -382,6 +383,9 @@ config FPU If you don't know what to do here, say Y. +config CPU_HAS_NO_UNALIGNED + bool + endmenu menu "Kernel features" -- 2.25.1