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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 B915CC33C99 for ; Tue, 26 Nov 2019 18:52:15 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (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 870262075C for ; Tue, 26 Nov 2019 18:52:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 870262075C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.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 hemlock.osuosl.org (Postfix) with ESMTP id 5CC5E86CD7; Tue, 26 Nov 2019 18:52:15 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lcOYscSjeBPZ; Tue, 26 Nov 2019 18:52:14 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id AF8C085F4B; Tue, 26 Nov 2019 18:52:14 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 8FB9DC0880; Tue, 26 Nov 2019 18:52:14 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 29BDAC0878 for ; Tue, 26 Nov 2019 18:52:13 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 186F485CB4 for ; Tue, 26 Nov 2019 18:52:13 +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 MgdZaeuitR2Q for ; Tue, 26 Nov 2019 18:52:12 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) by whitealder.osuosl.org (Postfix) with ESMTPS id 006AD85722 for ; Tue, 26 Nov 2019 18:52:11 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 38C30ABD6; Tue, 26 Nov 2019 18:52:08 +0000 (UTC) Message-ID: <45feed391bbd95c46f64b31cf8817d4f773c8da1.camel@suse.de> Subject: Re: [PATCH v2] dma-mapping: treat dev->bus_dma_mask as a DMA limit From: Nicolas Saenz Julienne To: Robin Murphy , Christoph Hellwig , Nathan Chancellor Date: Tue, 26 Nov 2019 19:51:59 +0100 In-Reply-To: <0b851d0e-37c7-062e-c287-05f8c8a54c16@arm.com> References: <20191121092646.8449-1-nsaenzjulienne@suse.de> <20191123165108.GA15306@ubuntu-x2-xlarge-x86> <20191125074412.GA30595@lst.de> <0b851d0e-37c7-062e-c287-05f8c8a54c16@arm.com> User-Agent: Evolution 3.34.1 MIME-Version: 1.0 Cc: Peter Zijlstra , Benjamin Herrenschmidt , Dave Hansen , linux-mips@vger.kernel.org, linux-ide@vger.kernel.org, Paul Mackerras , "H. Peter Anvin" , Frank Rowand , Paul Burton , Michael Ellerman , x86@kernel.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 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: multipart/mixed; boundary="===============0396297438206779582==" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" --===============0396297438206779582== Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-B9dp7hYRMOcivm0VMcWv" --=-B9dp7hYRMOcivm0VMcWv Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, 2019-11-25 at 16:33 +0000, Robin Murphy wrote: > On 25/11/2019 7:44 am, Christoph Hellwig wrote: > > On Sat, Nov 23, 2019 at 09:51:08AM -0700, Nathan Chancellor wrote: > > > Just as an FYI, this introduces a warning on arm32 allyesconfig for m= e: > >=20 > > I think the dma_limit argument to iommu_dma_alloc_iova should be a u64 > > and/or we need to use min_t and open code the zero exception. > >=20 > > Robin, Nicolas - any opinions? >=20 > Yeah, given that it's always held a mask I'm not entirely sure why it=20 > was ever a dma_addr_t rather than a u64. Unless anyone else is desperate= =20 > to do it I'll get a cleanup patch ready for rc1. Sounds good to me too Robin, since I started the mess, I'll be happy to do it if it helps offload= ing some work from you. Regards, Nicolas --=-B9dp7hYRMOcivm0VMcWv Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEErOkkGDHCg2EbPcGjlfZmHno8x/4FAl3ddE8ACgkQlfZmHno8 x/5fVwgAnN7cpWXNHEbGgqyZcMqmBWCtR0bMa/xIu1xNgr/CAwMMZj0Z3/+6d18p mlU5N6AqlkTxefP9mV5ZxBzugcsriGR4+qJ05kZZAMxAeG625qDkfhSEl0FmUZRT WmEv98IN0aFzHEjZJAyPDNV8Ff1a3JpoHKQmnYs5z438rMZt49CPBC0jNPFdaEuj v9ry1DkR+cGYuD1WRyBQJjtze14XoG7ZCu0o9Htc02GZHq3OuabxDikuTC+UJ1jR BZX4ak4qGpJUGYT8fQA7IOA94Sd/N/CHMrDp8yv5f/kRcprKqgGX8PnMCUOPf4ns PsCZZGhEKvVwZy3/+QzWSYQ7q20O8w== =WYKI -----END PGP SIGNATURE----- --=-B9dp7hYRMOcivm0VMcWv-- --===============0396297438206779582== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu --===============0396297438206779582==--