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=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 4C5FAECE58D for ; Wed, 9 Oct 2019 08:53:32 +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 15E66218AC for ; Wed, 9 Oct 2019 08:53:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="GWD9aDzD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 15E66218AC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=andestech.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Subject:To:From :Date: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=NOlRr7I4PP0GEthSP5xmuAMKSR+FXHEM7yKPOERC47o=; b=GWD9aDzDTp1mv/ RfCnTEhDg1rCr0UiqHNv/0Y6Y2sYLPn9zGvFiuHll0pcMHptBdARFqpi/Hnr25mN9vU7KsxiBBMEJ CiVWpUVSfNFyVtO0sgcTJ+IGlkkF59BijUp+E/APFBq8muMuQTJ2QkK4fUwkNBWT+g3Y3VwpDX44n wDrpjPZT2PdP3OQFlB4xY9lhT2X4/J2j9Hak02Q4AHm8I9CajZymSsikTQFCQnlG331joy2RhPGAz qZ7bec6RyHmXay3lJDhLCLYH/N0GQ+zTwWw6o/v2lMhc5/pAV+YRtwOlCjB3rEPK/qFZXEy/5cz3g 5tkZh+7E6x8h11PZRTuw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iI7is-0000xn-PE; Wed, 09 Oct 2019 08:53:30 +0000 Received: from 59-120-53-16.hinet-ip.hinet.net ([59.120.53.16] helo=ATCSQR.andestech.com) by bombadil.infradead.org with esmtps (Exim 4.92.2 #3 (Red Hat Linux)) id 1iI7ip-0000x4-QN for linux-riscv@lists.infradead.org; Wed, 09 Oct 2019 08:53:29 +0000 Received: from mail.andestech.com (atcpcs16.andestech.com [10.0.1.222]) by ATCSQR.andestech.com with ESMTP id x998bE2t098477; Wed, 9 Oct 2019 16:37:14 +0800 (GMT-8) (envelope-from alankao@andestech.com) Received: from andestech.com (10.0.15.65) by ATCPCS16.andestech.com (10.0.1.222) with Microsoft SMTP Server id 14.3.123.3; Wed, 9 Oct 2019 16:53:13 +0800 Date: Wed, 9 Oct 2019 16:53:14 +0800 From: Alan Kao To: , Subject: Does sfence.vma implicitly cover what fence.i does? Message-ID: <20191009085313.GA14021@andestech.com> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.5.24 (2015-08-30) X-Originating-IP: [10.0.15.65] X-DNSRBL: X-MAIL: ATCSQR.andestech.com x998bE2t098477 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191009_015328_112353_AF82462E X-CRM114-Status: UNSURE ( 2.33 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-riscv@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org Hi Paul, Palmer, In arch/riscv/include/asm/tlbflush.h, the comment says > Flush entire local TLB. 'sfence.vma' implicitly fences with the instruction > cache as well, so a 'fence.i' is not necessary. and in the privileged spec, it is stated that > Executing an SFENCE.VMA instruction guarantees that any previous stores > already visible to the current RISC-V hart are ordered before all subsequent > implicit references from that hart to the memory-management data structures. So my question is straightforward. Is I-cache a kind of memory-management data structure? am I missing something here? Thanks for any clarification. Alan _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv