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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 A4385C43215 for ; Thu, 21 Nov 2019 07:32:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 761332089D for ; Thu, 21 Nov 2019 07:32:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726379AbfKUHcA (ORCPT ); Thu, 21 Nov 2019 02:32:00 -0500 Received: from verein.lst.de ([213.95.11.211]:44458 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726230AbfKUHb7 (ORCPT ); Thu, 21 Nov 2019 02:31:59 -0500 Received: by verein.lst.de (Postfix, from userid 2407) id 0FAB768B05; Thu, 21 Nov 2019 08:31:53 +0100 (CET) Date: Thu, 21 Nov 2019 08:31:52 +0100 From: Christoph Hellwig To: Robin Murphy Cc: Christoph Hellwig , Nicolas Saenz Julienne , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Bjorn Helgaas , Lorenzo Pieralisi , Hanjun Guo , Sudeep Holla , Jens Axboe , Joerg Roedel , Rob Herring , Frank Rowand , Marek Szyprowski , Benjamin Herrenschmidt , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, Paul Mackerras , "H. Peter Anvin" , Paul Burton , Michael Ellerman , x86@kernel.org, phil@raspberrypi.org, linux-acpi@vger.kernel.org, Ingo Molnar , James Hogan , Len Brown , devicetree@vger.kernel.org, Borislav Petkov , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, "Rafael J. Wysocki" , linux-mips@vger.kernel.org, Ralf Baechle , iommu@lists.linux-foundation.org, linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH] dma-mapping: treat dev->bus_dma_mask as a DMA limit Message-ID: <20191121073152.GB24024@lst.de> References: <20191113161340.27228-1-nsaenzjulienne@suse.de> <20191119170006.GA19569@lst.de> <7609007d-52f5-bb10-e8d5-96fadbfab46d@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7609007d-52f5-bb10-e8d5-96fadbfab46d@arm.com> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org On Tue, Nov 19, 2019 at 05:17:03PM +0000, Robin Murphy wrote: > TBH I can't see it being a massive problem even if the DMA patch, driver > and DTS patch went entirely separately via the respective DMA, PCI, and > arm-soc trees in the same cycle. Bisecting over a merge window is a big > enough pain in the bum as it is, and if the worst case is that someone > trying to do that on a Pi4 has a wonky PCI controller appear for a couple > of commits, they may as well just disable that driver for their bisection, > because it wasn't there at the start so can't possibly be the thing they're > looking for regressions in ;) Agreed. Nicolas, can you send a respin? That way I can still queue it up for 5.5. 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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 D9566C432C0 for ; Thu, 21 Nov 2019 07:32:02 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (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 AC38320855 for ; Thu, 21 Nov 2019 07:32:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AC38320855 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 1157587D2D; Thu, 21 Nov 2019 07:32:02 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id LT1Arq60t3IN; Thu, 21 Nov 2019 07:32:01 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id 62CBA87C42; Thu, 21 Nov 2019 07:32:01 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 34023C1DD7; Thu, 21 Nov 2019 07:32:01 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 0525AC18DA for ; Thu, 21 Nov 2019 07:32:00 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id CDB1E204D7 for ; Thu, 21 Nov 2019 07:31:59 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YOsG7d2U0VxR for ; Thu, 21 Nov 2019 07:31:58 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by silver.osuosl.org (Postfix) with ESMTPS id 5F1391FE49 for ; Thu, 21 Nov 2019 07:31:58 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 0FAB768B05; Thu, 21 Nov 2019 08:31:53 +0100 (CET) Date: Thu, 21 Nov 2019 08:31:52 +0100 From: Christoph Hellwig To: Robin Murphy Subject: Re: [PATCH] dma-mapping: treat dev->bus_dma_mask as a DMA limit Message-ID: <20191121073152.GB24024@lst.de> References: <20191113161340.27228-1-nsaenzjulienne@suse.de> <20191119170006.GA19569@lst.de> <7609007d-52f5-bb10-e8d5-96fadbfab46d@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <7609007d-52f5-bb10-e8d5-96fadbfab46d@arm.com> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: Peter Zijlstra , Benjamin Herrenschmidt , Dave Hansen , linux-mips@vger.kernel.org, linux-ide@vger.kernel.org, Paul Mackerras , "H. Peter Anvin" , Frank Rowand , Christoph Hellwig , Paul Burton , Michael Ellerman , x86@kernel.org, phil@raspberrypi.org, linux-acpi@vger.kernel.org, Ingo Molnar , linux-pci@vger.kernel.org, James Hogan , Len Brown , devicetree@vger.kernel.org, Rob Herring , Borislav Petkov , Andy Lutomirski , Bjorn Helgaas , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Jens Axboe , "Rafael J. Wysocki" , Hanjun Guo , linux-kernel@vger.kernel.org, Ralf Baechle , iommu@lists.linux-foundation.org, Sudeep Holla , linuxppc-dev@lists.ozlabs.org, Nicolas Saenz Julienne X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Tue, Nov 19, 2019 at 05:17:03PM +0000, Robin Murphy wrote: > TBH I can't see it being a massive problem even if the DMA patch, driver > and DTS patch went entirely separately via the respective DMA, PCI, and > arm-soc trees in the same cycle. Bisecting over a merge window is a big > enough pain in the bum as it is, and if the worst case is that someone > trying to do that on a Pi4 has a wonky PCI controller appear for a couple > of commits, they may as well just disable that driver for their bisection, > because it wasn't there at the start so can't possibly be the thing they're > looking for regressions in ;) Agreed. Nicolas, can you send a respin? That way I can still queue it up for 5.5. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu 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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 47FAAC432C0 for ; Thu, 21 Nov 2019 08:22:59 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 B8A8220718 for ; Thu, 21 Nov 2019 08:22:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B8A8220718 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 47JXcc5qKHzDr2k for ; Thu, 21 Nov 2019 19:22:56 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lst.de (client-ip=213.95.11.211; helo=verein.lst.de; envelope-from=hch@lst.de; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=lst.de Received: from verein.lst.de (verein.lst.de [213.95.11.211]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 47JWTq1qBPzDqY6 for ; Thu, 21 Nov 2019 18:31:59 +1100 (AEDT) Received: by verein.lst.de (Postfix, from userid 2407) id 0FAB768B05; Thu, 21 Nov 2019 08:31:53 +0100 (CET) Date: Thu, 21 Nov 2019 08:31:52 +0100 From: Christoph Hellwig To: Robin Murphy Subject: Re: [PATCH] dma-mapping: treat dev->bus_dma_mask as a DMA limit Message-ID: <20191121073152.GB24024@lst.de> References: <20191113161340.27228-1-nsaenzjulienne@suse.de> <20191119170006.GA19569@lst.de> <7609007d-52f5-bb10-e8d5-96fadbfab46d@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7609007d-52f5-bb10-e8d5-96fadbfab46d@arm.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Zijlstra , Dave Hansen , linux-mips@vger.kernel.org, linux-ide@vger.kernel.org, Paul Mackerras , "H. Peter Anvin" , Frank Rowand , Christoph Hellwig , Marek Szyprowski , Lorenzo Pieralisi , Paul Burton , Joerg Roedel , x86@kernel.org, phil@raspberrypi.org, linux-acpi@vger.kernel.org, Ingo Molnar , linux-pci@vger.kernel.org, James Hogan , Len Brown , devicetree@vger.kernel.org, Rob Herring , Borislav Petkov , Andy Lutomirski , Bjorn Helgaas , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Jens Axboe , "Rafael J. Wysocki" , Hanjun Guo , linux-kernel@vger.kernel.org, Ralf Baechle , iommu@lists.linux-foundation.org, Sudeep Holla , linuxppc-dev@lists.ozlabs.org, Nicolas Saenz Julienne Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Tue, Nov 19, 2019 at 05:17:03PM +0000, Robin Murphy wrote: > TBH I can't see it being a massive problem even if the DMA patch, driver > and DTS patch went entirely separately via the respective DMA, PCI, and > arm-soc trees in the same cycle. Bisecting over a merge window is a big > enough pain in the bum as it is, and if the worst case is that someone > trying to do that on a Pi4 has a wonky PCI controller appear for a couple > of commits, they may as well just disable that driver for their bisection, > because it wasn't there at the start so can't possibly be the thing they're > looking for regressions in ;) Agreed. Nicolas, can you send a respin? That way I can still queue it up for 5.5. 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,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 C1DCEC43141 for ; Thu, 21 Nov 2019 07:32:03 +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 9201E20855 for ; Thu, 21 Nov 2019 07:32:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="FkS99Uav" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9201E20855 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-arm-kernel-bounces+infradead-linux-arm-kernel=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: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=TmxTxhGa5/b7adr4b0r1AM9kEs5pB5QZ+qf0OE72hkE=; b=FkS99UavLTA+Ub m28/DmHn9FsTsEdrAyE//7gXqBJWDaII+KvSdQNBPr4FAS6FB92qiArkCjMEio8fA93evgAh3Uevj Jf8/+++80GHlWANFi1nJffLW0Vo+QMcNQDNDAuIT2oceeO/nq+/Hqi0OnxHZVnOUgearFSz1OC9QB UBd3jDtQ/0I40J9QwVH2R9K7Ba380U6AVA5YLSgum3NExDo8QMZMnJoCdVxrAAgQKA02Q/aMY+owj mFfQm2h/JQFav5841v0IRu2R4MoCw+KMSO3Lc+TMAJE50KlfMZN9ZCzwggA7M4ltl0u3CLcDHC4zY THkuqGXRPvOSvJx51Mcg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iXgwa-00041N-6O; Thu, 21 Nov 2019 07:32:00 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iXgwX-000412-Es for linux-arm-kernel@lists.infradead.org; Thu, 21 Nov 2019 07:31:58 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 0FAB768B05; Thu, 21 Nov 2019 08:31:53 +0100 (CET) Date: Thu, 21 Nov 2019 08:31:52 +0100 From: Christoph Hellwig To: Robin Murphy Subject: Re: [PATCH] dma-mapping: treat dev->bus_dma_mask as a DMA limit Message-ID: <20191121073152.GB24024@lst.de> References: <20191113161340.27228-1-nsaenzjulienne@suse.de> <20191119170006.GA19569@lst.de> <7609007d-52f5-bb10-e8d5-96fadbfab46d@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <7609007d-52f5-bb10-e8d5-96fadbfab46d@arm.com> 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-20191120_233157_650676_DAEA021F X-CRM114-Status: GOOD ( 12.03 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Zijlstra , Benjamin Herrenschmidt , Dave Hansen , linux-mips@vger.kernel.org, linux-ide@vger.kernel.org, Paul Mackerras , "H. Peter Anvin" , Frank Rowand , Christoph Hellwig , Marek Szyprowski , Lorenzo Pieralisi , Paul Burton , Michael Ellerman , Joerg Roedel , x86@kernel.org, phil@raspberrypi.org, linux-acpi@vger.kernel.org, Ingo Molnar , linux-pci@vger.kernel.org, James Hogan , Len Brown , devicetree@vger.kernel.org, Rob Herring , Borislav Petkov , Andy Lutomirski , Bjorn Helgaas , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Jens Axboe , "Rafael J. Wysocki" , Hanjun Guo , linux-kernel@vger.kernel.org, Ralf Baechle , iommu@lists.linux-foundation.org, Sudeep Holla , linuxppc-dev@lists.ozlabs.org, Nicolas Saenz Julienne Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Nov 19, 2019 at 05:17:03PM +0000, Robin Murphy wrote: > TBH I can't see it being a massive problem even if the DMA patch, driver > and DTS patch went entirely separately via the respective DMA, PCI, and > arm-soc trees in the same cycle. Bisecting over a merge window is a big > enough pain in the bum as it is, and if the worst case is that someone > trying to do that on a Pi4 has a wonky PCI controller appear for a couple > of commits, they may as well just disable that driver for their bisection, > because it wasn't there at the start so can't possibly be the thing they're > looking for regressions in ;) Agreed. Nicolas, can you send a respin? That way I can still queue it up for 5.5. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel