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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id C9C9DCAC592 for ; Fri, 19 Sep 2025 07:45:30 +0000 (UTC) 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:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=98xu7PorXhl0pO4ecQVDs2Q0XnUcaPm8Gd0mlGWyK+U=; b=XmWnHzjeNt2kk+ Df7rpcTYyNOqpGxLMWXp2ShKPQQBUKivkHrHlTg4hWhwP1SvUJUQl8rCaDy8zanugk3letGb27nq3 6G+YYRe8c4q2F2nKkZYcakoNjNfNFi1mVj+Y2Zu82NntOw3Kv6LNCIkad9KDopGFieOOMV+UHLoy3 eydIoc8NI4Kr9NwY6rhTpWgHkMdVwpDe0qzVw+RmvRCbRWcgpOQGrRNr9J+3OE4AtCVrTjqek4PcL qCYE0X3rp4NR+mkHbql4SYhnuRITVl+TFYHcipsv3/2zn82fAQBC3i++Tu0N58eGUFoF4rZt+tp8V RxPHlWv+VG1YfpqYuBLg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uzVo2-000000027Nz-3EyW; Fri, 19 Sep 2025 07:45:22 +0000 Received: from mail-wr1-x433.google.com ([2a00:1450:4864:20::433]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uzVo0-000000027NM-25TP for linux-riscv@lists.infradead.org; Fri, 19 Sep 2025 07:45:21 +0000 Received: by mail-wr1-x433.google.com with SMTP id ffacd0b85a97d-3c46686d1e6so1134116f8f.3 for ; Fri, 19 Sep 2025 00:45:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1758267919; x=1758872719; darn=lists.infradead.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=PNMgvIIFlPxMgwjf1A0nfVZAfJVYlyoyJvlDVyQp+0I=; b=eZoZZj8LBnnSnuAJCU00NWXOf7k2XojdFxrtBJVCHvDPa7yRVJSD8kY0Mo4eSrA/re NlT6c39LkJc0cNRqGdfPJt6mdAfQizlIeS4gzS4/72bes43Bb8j0WzxJhrh3DAejTM3p QEnZeg3xD1AmlzXNhWC5UGe0txKBK5zzGq2bPq/x+SmvUsYdxLtG26PYT5XPfZAppmRT uWFNiac/uDFSiwCSbgK+3zgmWjYtbeITepz4eUXPVVWTGC1zj2CWt8V0kWU1X3XI2wGU JAYaZdA7Gw2QMJH969jDW1CBuo0CwVNcbmZsDWrjN328ZbYqyEzJFeFcDMSYCV+Gzey6 TDIA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758267919; x=1758872719; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=PNMgvIIFlPxMgwjf1A0nfVZAfJVYlyoyJvlDVyQp+0I=; b=fu+OBwixYx9WmTwu+XlPn3/M+STfhjuBHwdjla7k9yIFa7bf474VbVEy6jfIXfwfoR xBupR7MagbWxJmm3GrCdlDOP1hZFB+BftehFVGBCV3DvKbRZgJnbRDAsGE8lF9cqdz6b kZBOU+CsRBmUt1eRBlCCHr2gYUm80D5VbbTCotBwffRFaw293rO+dNtcAiswMYoQU4ol 0J4Prh5KE4qOIkgn882DD2kgZqmaor+xRZa/rwfF2IVKleXaz3m30jB8iBLAEVhTARKy mEoc0WxYQt9H4nJlK1MpgSxDCAOXlAurVSvRT6Sh1CPN3hAtMz6ujBsZTvYvz5QYPRo7 5PuA== X-Forwarded-Encrypted: i=1; AJvYcCVcOSItf2m54qM+WMyOntGurTsnvd9wum472UIyRREeR5aWqQc6EtS7bFVJiLW1GvaTq5hTcMQh6xi8IQ==@lists.infradead.org X-Gm-Message-State: AOJu0Yx7qkMk62yxW1ZfQrBVk6Z9f+SAFHWZ2G9qAMhys29A+wM62SE5 DQJGACwAiui/Hi6Mz0sIwcPWzoYIIS52VYxvxVriSMhf6ynFbDn9Zogp X-Gm-Gg: ASbGncu2APZgUbWJd6CY9Vt3x9QevJEP9lPIyP2rQf5k/DIyrfJIyJSnrIgxRy9jeBk 3TgmFspdR1zrb1n4hbWoZtb7TImUrzmQRhGHk4dYOyoipZttk6Vpk0WdtazFUej+C0lo2udy+F0 +JHgF8NF/wi05NJdgV1HZh7ibqQH8IwzTKhhh9+0K1SLP2AeSHt4K/NXHmRst3K+tA3ljzGgVQY QG3n9uqisP3KI5urApX61tZG6YQsmLaqAMtdY0VFxEs9sI48XzSa8SFoz2uP2lYV5o8ktblcdOP 1/AYAYC36Tf6qWsq3uPZknPUqHpZq7++9jUoupYgh52eBpLHSg7BXIlNrUwbqjvfCnH3Tv7NO2a 4JXCF3b9NZSvaK2+2x+bF X-Google-Smtp-Source: AGHT+IG5w03VkX5w0L+qmk9oTgo8UMgIyxUlqtHb7DAa5eouVlBho3WcVeCjzVUkdw6abcur45ZJQg== X-Received: by 2002:a05:6000:25c3:b0:3ee:1586:6c85 with SMTP id ffacd0b85a97d-3ee8713efdcmr1612059f8f.57.1758267918368; Fri, 19 Sep 2025 00:45:18 -0700 (PDT) Received: from andrea ([176.201.192.207]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45f3211e8c7sm73637115e9.3.2025.09.19.00.45.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Sep 2025 00:45:17 -0700 (PDT) Date: Fri, 19 Sep 2025 09:45:11 +0200 From: Andrea Parri To: Xu Lu Cc: Guo Ren , robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, ajones@ventanamicro.com, brs@rivosinc.com, devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, apw@canonical.com, joe@perches.com Subject: Re: [External] Re: [PATCH v2 0/4] riscv: Add Zalasr ISA extension support Message-ID: References: <20250902042432.78960-1-luxu.kernel@bytedance.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250919_004520_541671_8F734EAD X-CRM114-Status: UNSURE ( 6.69 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org > The existing implementation of spin_unlock, when followed by > spin_lock, is equal to 'FENCE rw, rw' for operations before This is not true without Zacas, that is, when using LR/SC: write-to-read remains unordered in that case. Andrea _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv