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 7CB65C433E0 for ; Tue, 9 Feb 2021 08:42:06 +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 E84F864EA6 for ; Tue, 9 Feb 2021 08:42:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E84F864EA6 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=uEzwo7LPEVB9Chl014AWRFT/zM9XW/TcVGah1FSTM10=; b=gx7yUd7e3/zNWwedUbMvopODc ooRxtrobpuVTDtJpAgrgf1kNxRj70gSRnID+x2P1YvpZTzFZSfQWNILX9QFDrbPvITHKavgq3Lyhp h+IGQ+nbXmR0TR8xOPzAMPyK2TumnN+bjIKIivgdnaBQiViAZqc1v8LN8xJJyixyvj4mYDcVK0M8w gfT/nroZDa4nDbhNhwC4eoduUIyXckqqt0xBIafydezje6y+HSzZvv7B2YVfiMCo/aZS7yPWNRmcG 0hcInc8y3m2cINAnTHacwyh0O9NSv9SkR7le47xwvOzg6DAAHxHy+uh6YnPp+owWePCGKhT9HQ72D ZASuBx+Kg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l9Oau-0002uX-4Y; Tue, 09 Feb 2021 08:42:00 +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 1l9Oas-0002uD-0h for linux-nvme@lists.infradead.org; Tue, 09 Feb 2021 08:41:59 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 70CBD68B02; Tue, 9 Feb 2021 09:41:56 +0100 (CET) Date: Tue, 9 Feb 2021 09:41:56 +0100 From: Christoph Hellwig To: jxgao@google.com, gregkh@linuxfoundation.org Subject: Re: preserve DMA offsets when using swiotlb v2 Message-ID: <20210209084156.GA32320@lst.de> References: <20210207160327.2955490-1-hch@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210207160327.2955490-1-hch@lst.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-20210209_034158_237729_1903201D X-CRM114-Status: GOOD ( 16.89 ) 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: saravanak@google.com, konrad.wilk@oracle.com, marcorr@google.com, linux-nvme@lists.infradead.org, iommu@lists.linux-foundation.org, kbusch@kernel.org, robin.murphy@arm.com 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 Sorry for being a little pushy, any chance we could get this reviewed in time for the 5.12 merge window? On Sun, Feb 07, 2021 at 05:03:18PM +0100, Christoph Hellwig wrote: > Hi all, > > this series make NVMe happy when running with swiotlb. This caters > towards to completely broken NVMe controllers that ignore the > specification (hello to the biggest cloud provider on the planet!), > to crappy SOC that have addressing limitations, or "secure" > virtualization that force bounce buffering to enhance the user > experience. Or in other words, no one sane should hit it, but > people do. > > It is basically a respin of the > > "SWIOTLB: Preserve swiotlb map offset when needed." > > series from Jianxiong Gao. It complete rewrites the swiotlb part so that > the offset really is preserved and not just the offset into the swiotlb > slot, and to do so it grew half a dozen patches to refactor the swiotlb > so that a mere mortal like me could actually understand it. > > Changes since v2: > - cleanup nr_slots a little more > - fix a check in get_max_slots > - add a IO_TLB_SIZE define > - cleanup find_slots a little more > - fix the nvme patch to actually compile > _______________________________________________ > iommu mailing list > iommu@lists.linux-foundation.org > https://lists.linuxfoundation.org/mailman/listinfo/iommu ---end quoted text--- _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme