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=-10.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, 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 3E337C43464 for ; Fri, 18 Sep 2020 10:02:45 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (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 8A0B4208B8 for ; Fri, 18 Sep 2020 10:02:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8A0B4208B8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id E7519872ED; Fri, 18 Sep 2020 10:02:43 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id c8takuymSdxF; Fri, 18 Sep 2020 10:02:42 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id 32CFF872CC; Fri, 18 Sep 2020 10:02:42 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 185B0C0859; Fri, 18 Sep 2020 10:02:42 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 84BEDC0051 for ; Fri, 18 Sep 2020 10:02:40 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 78DD1877E3 for ; Fri, 18 Sep 2020 10:02:40 +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 NllfFJvqI2Gt for ; Fri, 18 Sep 2020 10:02:39 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from theia.8bytes.org (8bytes.org [81.169.241.247]) by hemlock.osuosl.org (Postfix) with ESMTPS id 8809F877E1 for ; Fri, 18 Sep 2020 10:02:39 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id 91457293; Fri, 18 Sep 2020 12:02:37 +0200 (CEST) Date: Fri, 18 Sep 2020 12:02:36 +0200 From: Joerg Roedel To: Jacob Pan Subject: Re: [PATCH v9 0/7] IOMMU user API enhancement Message-ID: <20200918100235.GQ31590@8bytes.org> References: <1599861476-53416-1-git-send-email-jacob.jun.pan@linux.intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1599861476-53416-1-git-send-email-jacob.jun.pan@linux.intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) Cc: "Tian, Kevin" , Raj Ashok , Jonathan Corbet , Jean-Philippe Brucker , Alex Williamson , LKML , iommu@lists.linux-foundation.org, Wu Hao , David Woodhouse , Yi Sun 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" Hi Jacob, On Fri, Sep 11, 2020 at 02:57:49PM -0700, Jacob Pan wrote: > IOMMU user API header was introduced to support nested DMA translation and > related fault handling. The current UAPI data structures consist of three > areas that cover the interactions between host kernel and guest: > - fault handling > - cache invalidation > - bind guest page tables, i.e. guest PASID > > Future extensions are likely to support more architectures and vIOMMU features. > > In the previous discussion, using user-filled data size and feature flags is > made a preferred approach over a unified version number. > https://lkml.org/lkml/2020/1/29/45 > > In addition to introduce argsz field to data structures, this patchset is also > trying to document the UAPI design, usage, and extension rules. VT-d driver > changes to utilize the new argsz field is included, VFIO usage is to follow. > > This set is available at: > https://github.com/jacobpan/linux.git vsva_v5.9_uapi_v9 This changes user visible structs in incompatible ways, are you sure those are not used yet anywhere? Please address Randy's comments on patch 1 and my comment about the build-time checking and repost with linux-api@vger.kernel.org on Cc. Regards, Joerg _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu