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_2 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 1D1B7C43463 for ; Fri, 18 Sep 2020 17:24:39 +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 B9D2721707 for ; Fri, 18 Sep 2020 17:24:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B9D2721707 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com 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 5DAF587840; Fri, 18 Sep 2020 17:24:38 +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 mHHxFJmAVrzk; Fri, 18 Sep 2020 17:24:34 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id B8F4687652; Fri, 18 Sep 2020 17:24:34 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id AA552C0859; Fri, 18 Sep 2020 17:24:34 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 5F610C0051 for ; Fri, 18 Sep 2020 17:24:33 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 4794287A97 for ; Fri, 18 Sep 2020 17:24:33 +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 7B6YHuHUwdzK for ; Fri, 18 Sep 2020 17:24:32 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by whitealder.osuosl.org (Postfix) with ESMTPS id 4E38087A85 for ; Fri, 18 Sep 2020 17:24:32 +0000 (UTC) IronPort-SDR: rFl0mJJF8u4GpRAxcZVSirj4zZ7pzVp+GxQzSk+GqZpBze1Cw2a848/oUgj0Iu/SzyaddQgNiO FUkpE9WIB5QQ== X-IronPort-AV: E=McAfee;i="6000,8403,9748"; a="160050811" X-IronPort-AV: E=Sophos;i="5.77,274,1596524400"; d="scan'208";a="160050811" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Sep 2020 10:24:28 -0700 IronPort-SDR: rr9f3VCLLmOjz9hSvF10aX5G17aKu+w6kiEVPPxj6fmpFYwliE+msfw5gaIXAy7ffw00MoPXAF vHMwD0c575Bg== X-IronPort-AV: E=Sophos;i="5.77,274,1596524400"; d="scan'208";a="347074562" Received: from jacob-builder.jf.intel.com (HELO jacob-builder) ([10.7.199.155]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Sep 2020 10:24:27 -0700 Date: Fri, 18 Sep 2020 10:26:30 -0700 From: Jacob Pan To: Joerg Roedel Subject: Re: [PATCH v9 0/7] IOMMU user API enhancement Message-ID: <20200918102630.6d592442@jacob-builder> In-Reply-To: <20200918100235.GQ31590@8bytes.org> References: <1599861476-53416-1-git-send-email-jacob.jun.pan@linux.intel.com> <20200918100235.GQ31590@8bytes.org> Organization: OTC X-Mailer: Claws Mail 3.13.2 (GTK+ 2.24.30; x86_64-pc-linux-gnu) MIME-Version: 1.0 Cc: "Tian, Kevin" , Jacob Pan , Raj Ashok , Jonathan Corbet , Jean-Philippe Brucker , iommu@lists.linux-foundation.org, LKML , Alex Williamson , 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 Joerg, On Fri, 18 Sep 2020 12:02:36 +0200, Joerg Roedel wrote: > 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? > These structs are not used yet in that IOMMU UAPI does not provide direct user IOCTLs. For guest SVA of assigned devices, VFIO is used. Yi's companion patches are here. https://lore.kernel.org/linux-iommu/5dd95fbf-054c-3bbc-e76b-2d5636214ff2@redhat.com/T/#t These user structs can also be used by other framework in the future, such as vDPA. > 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. > Will do. > Regards, > > Joerg Thanks, Jacob _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu