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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 4E9FDC433B4 for ; Mon, 17 May 2021 16:36:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 319F3610E9 for ; Mon, 17 May 2021 16:36:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242589AbhEQQhY (ORCPT ); Mon, 17 May 2021 12:37:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40654 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241086AbhEQQhD (ORCPT ); Mon, 17 May 2021 12:37:03 -0400 Received: from theia.8bytes.org (8bytes.org [IPv6:2a01:238:4383:600:38bc:a715:4b6d:a889]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 49C67C05BD09 for ; Mon, 17 May 2021 08:35:14 -0700 (PDT) Received: by theia.8bytes.org (Postfix, from userid 1000) id 1A3C23A4; Mon, 17 May 2021 17:35:12 +0200 (CEST) Date: Mon, 17 May 2021 17:35:10 +0200 From: Joerg Roedel To: Jason Gunthorpe Cc: "Tian, Kevin" , Christoph Hellwig , Alex Williamson , David Woodhouse , Lu Baolu , Will Deacon , Kirti Wankhede , "linux-arm-kernel@lists.infradead.org" , "iommu@lists.linux-foundation.org" , "kvm@vger.kernel.org" Subject: Re: [PATCH 3/6] vfio: remove the unused mdev iommu hook Message-ID: References: <20210513120058.GG1096940@ziepe.ca> <20210514121925.GI1096940@ziepe.ca> <20210514133143.GK1096940@ziepe.ca> <20210517123010.GO1096940@ziepe.ca> <20210517133500.GP1096940@ziepe.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210517133500.GP1096940@ziepe.ca> Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Mon, May 17, 2021 at 10:35:00AM -0300, Jason Gunthorpe wrote: > Well, I'm sorry, but there is a huge other thread talking about the > IOASID design in great detail and why this is all needed. Jumping into > this thread without context and basically rejecting all the > conclusions that were reached over the last several weeks is really > not helpful - especially since your objection is not technical. > > I think you should wait for Intel to put together the /dev/ioasid uAPI > proposal and the example use cases it should address then you can give > feedback there, with proper context. Yes, I think the next step is that someone who read the whole thread writes up the conclusions and a rough /dev/ioasid API proposal, also mentioning the use-cases it addresses. Based on that we can discuss the implications this needs to have for IOMMU-API and code. >From the use-cases I know the mdev concept is just fine. But if there is a more generic one we can talk about it. Regards, Joerg