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=-17.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 A28D5C433F5 for ; Tue, 14 Sep 2021 17:08:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 82EB361130 for ; Tue, 14 Sep 2021 17:08:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230398AbhINRJg (ORCPT ); Tue, 14 Sep 2021 13:09:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48346 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229517AbhINRJe (ORCPT ); Tue, 14 Sep 2021 13:09:34 -0400 Received: from mail-qk1-x730.google.com (mail-qk1-x730.google.com [IPv6:2607:f8b0:4864:20::730]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B69B3C061574 for ; Tue, 14 Sep 2021 10:08:16 -0700 (PDT) Received: by mail-qk1-x730.google.com with SMTP id y144so97878qkb.6 for ; Tue, 14 Sep 2021 10:08:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bluespec-com.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=d9SzK4pBoaf11lP96SjVpjf29pHlYDeVwg9n+E1Drc4=; b=QtkWU/EmWLfrq260BxNf0mGiuYZUZUYyoD0xPuezViRZ4mF/XCnK/tGHLl6uCuwm/l OEBXW3WMwE0A/G6QfVBdQklqm6ber7gQIzEoSN3yJBWkAmnQxly90HsctdXmmytbzMHF L3KoPTc+Mr9B9ig4OIUiOkfFqAQvWzvACCR/8Z5Ak8G8u2ih5jz8qYrxjV6ZrPlHV7nH BwsNYjdiDWP5SUb4oj+pil2/1n683Q+0Hj+me82nhkYlYutM9n9fdJneQXyogDsqvWYR fK3GeRs3REIVRpVxC3R5+Vhr/DO39JCqMeN/rHxtTsQw1cI5NFDsb8Hd8MuoOdbh+67y eXmA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=d9SzK4pBoaf11lP96SjVpjf29pHlYDeVwg9n+E1Drc4=; b=ygNYBjmM9qIhutnZo/NzZ8apsc9tEHjK45zXBUI/22BpjRjHDth+PJmuNBZzqC9+Kz zFQJ5Cev3/Uw/F1A2aHcBzk3xk+NMJChSDukSWzlF2uhkt/cDujkfA9/1Wd9+lPBk9R1 acoJmSY02amiYexBXEji9IH24DioqmiimkJE5IhCSGW00xBXruK/1PJlf1lLdzVsfgfM PM4RTNDGKJN3eZYa6Ql6H96fG1HgWl0KVwsndwmr4kWLdjJK/RE0gvAtVPaDOgwLH2YT YsPDYFhIWiviDbrhjHt92ToYflOVBlaLFfgJao3EE2WUcUYkq70F5/rJvcr6/d5CW1+i anKQ== X-Gm-Message-State: AOAM530Gj6opDD0rdGsxN63XN8rVsf5nFRitxKzreWggDqzvEH8E9we/ wtB2mOK7Iul6ZFVJhYCjUHMSiv4zlWfi X-Google-Smtp-Source: ABdhPJxLVtFRYIDvR4qJehRmv7dzyozIgYmkFOFqnGnr6OykjMd+avsbggpblmz9NAJNvd4rGy/Okw== X-Received: by 2002:a05:620a:916:: with SMTP id v22mr6042305qkv.338.1631639295927; Tue, 14 Sep 2021 10:08:15 -0700 (PDT) Received: from [10.28.133.11] ([154.3.44.94]) by smtp.gmail.com with ESMTPSA id r23sm6405377qtp.60.2021.09.14.10.08.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 14 Sep 2021 10:08:15 -0700 (PDT) Subject: Re: [PATCH 1/2] riscv: support HAVE_EFFICIENT_UNALIGNED_ACCESS To: Chen Huang , Paul Walmsley , Palmer Dabbelt , Albert Ou Cc: Kefeng Wang , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org References: <20210913121956.1776656-1-chenhuang5@huawei.com> <20210913121956.1776656-2-chenhuang5@huawei.com> From: Darius Rad Message-ID: <84697744-f51e-8aaf-d1d3-d063f99b7790@bluespec.com> Date: Tue, 14 Sep 2021 13:08:13 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 MIME-Version: 1.0 In-Reply-To: <20210913121956.1776656-2-chenhuang5@huawei.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/13/21 8:19 AM, Chen Huang wrote: > The RISCV ISA can perform efficient unaligned memory accesses > in hardware. This patch selects HAVE_EFFICIENT_UNALIGNED_ACCESS > for that. > Not all implementations do, so it seems like this is not appropriate. > Signed-off-by: Chen Huang > Signed-off-by: Kefeng Wang > --- > arch/riscv/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > index aac669a6c3d8..6e70bf50b02a 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 > select HAVE_FUNCTION_ERROR_INJECTION > select HAVE_FUTEX_CMPXCHG if FUTEX > select HAVE_GCC_PLUGINS >