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=-5.8 required=3.0 tests=BAYES_00,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 1F9F9C433E0 for ; Wed, 3 Feb 2021 09:52:04 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 A88C364E93 for ; Wed, 3 Feb 2021 09:52:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A88C364E93 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: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:List-Owner; bh=i/mpfOq+1gof13x43gvj+Bx9g6GWw+nRhxPu1FqDvUI=; b=VVNP6aKftYiyl939XaD9JMmoY +Q7PC9lIBx2HQM8FkN4BKlIIyomLJ56enjXDoVK/ORfVNi5JaEYnohiaHndNCELIk/2qzIeyBbhZL pwnLysnKQltaXnFqdHLCBy3qlubciTYAOUJ8x/l2uYq00bQbhr06LC5YRB+ZI3ZE+6DTn8l1Z/fbU QZx1Jjp1ACHsk3zCEpFbL35olsi6gvAIFxegs07K3vK+b4E5TyB4estZd7QSYl9SVsov4rGKIvrPk J3RsBlYgp54E6mriIhQqRDeDUJ5nH7rJByhDS7Zjo8/uN1eNkpAwz8VoTSgsbrsrBVNv4XCKQ3BP0 rAqw4aK9g==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l7EpI-00074W-DM; Wed, 03 Feb 2021 09:51:56 +0000 Received: from verein.lst.de ([213.95.11.211]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l7EpF-00074B-Kz for linux-nvme@lists.infradead.org; Wed, 03 Feb 2021 09:51:54 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 671BF6736F; Wed, 3 Feb 2021 10:51:48 +0100 (CET) Date: Wed, 3 Feb 2021 10:51:48 +0100 From: Christoph Hellwig To: Filippo Sironi Subject: Re: [PATCH] nvme: Add 48-bit DMA address quirk Message-ID: <20210203095148.GA8897@lst.de> References: <20210203094338.19473-1-sironi@amazon.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210203094338.19473-1-sironi@amazon.de> User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210203_045153_821521_A3199136 X-CRM114-Status: UNSURE ( 9.73 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sagi@grimberg.me, serebrin@amazon.com, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, axboe@fb.com, kbusch@kernel.org, hch@lst.de, dwmw@amazon.co.uk Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On Wed, Feb 03, 2021 at 10:43:38AM +0100, Filippo Sironi wrote: > Certain NVMe controllers don't support 64-bit DMA addresses. Instead, > they are limited to 48-bit DMA addresses. Let's add a quirk to use them > properly. WTF? This is such a grave NVMe spec compiance bug that I do not think we should support this buggy mess in Linux. _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme