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=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 8342BC48BE7 for ; Mon, 8 Jul 2019 08:07:47 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 62D0120844 for ; Mon, 8 Jul 2019 08:07:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 62D0120844 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 4FB6621CE; Mon, 8 Jul 2019 08:07:34 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 164551F48 for ; Mon, 8 Jul 2019 07:58:35 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id B2509148 for ; Mon, 8 Jul 2019 07:58:34 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 268CB3092640; Mon, 8 Jul 2019 07:58:34 +0000 (UTC) Received: from [10.36.116.46] (ovpn-116-46.ams2.redhat.com [10.36.116.46]) by smtp.corp.redhat.com (Postfix) with ESMTPS id BDBC018ACB; Mon, 8 Jul 2019 07:58:31 +0000 (UTC) Subject: Re: [PATCH 2/8] dt-bindings: document PASID property for IOMMU masters To: Jean-Philippe Brucker , will.deacon@arm.com References: <20190610184714.6786-1-jean-philippe.brucker@arm.com> <20190610184714.6786-3-jean-philippe.brucker@arm.com> From: Auger Eric Message-ID: <4a90dc21-e727-b2f6-1353-cb08babf0ec2@redhat.com> Date: Mon, 8 Jul 2019 09:58:30 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190610184714.6786-3-jean-philippe.brucker@arm.com> Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.43]); Mon, 08 Jul 2019 07:58:34 +0000 (UTC) Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, robh+dt@kernel.org, robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 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 Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org Hi Jean, On 6/10/19 8:47 PM, Jean-Philippe Brucker wrote: > On Arm systems, some platform devices behind an SMMU may support the PASID > feature, which offers multiple address space. Let the firmware tell us > when a device supports PASID. > > Reviewed-by: Rob Herring > Signed-off-by: Jean-Philippe Brucker > --- > Previous discussion on this patch last year: > https://patchwork.ozlabs.org/patch/872275/ > I split PASID and stall definitions, keeping only PASID here. > --- > Documentation/devicetree/bindings/iommu/iommu.txt | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/Documentation/devicetree/bindings/iommu/iommu.txt b/Documentation/devicetree/bindings/iommu/iommu.txt > index 5a8b4624defc..3c36334e4f94 100644 > --- a/Documentation/devicetree/bindings/iommu/iommu.txt > +++ b/Documentation/devicetree/bindings/iommu/iommu.txt > @@ -86,6 +86,12 @@ have a means to turn off translation. But it is invalid in such cases to > disable the IOMMU's device tree node in the first place because it would > prevent any driver from properly setting up the translations. > > +Optional properties: > +-------------------- > +- pasid-num-bits: Some masters support multiple address spaces for DMA, by > + tagging DMA transactions with an address space identifier. By default, > + this is 0, which means that the device only has one address space. > + Reviewed-by: Eric Auger Thanks Eric > > Notes: > ====== > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu