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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 9D4B6C433ED for ; Mon, 10 May 2021 12:58:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 670AF611BD for ; Mon, 10 May 2021 12:58:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241866AbhEJMxv (ORCPT ); Mon, 10 May 2021 08:53:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57500 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244390AbhEJL7B (ORCPT ); Mon, 10 May 2021 07:59:01 -0400 Received: from mail-qk1-x736.google.com (mail-qk1-x736.google.com [IPv6:2607:f8b0:4864:20::736]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B22CBC08C5F3 for ; Mon, 10 May 2021 04:54:15 -0700 (PDT) Received: by mail-qk1-x736.google.com with SMTP id q136so14931981qka.7 for ; Mon, 10 May 2021 04:54:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=4+X4WteNsgQ19+v1jrZ7Ekzjl0pM0a2tSBb6kLiTT48=; b=PWyo1gl6oTeAtHGCeTBEPCa3Yr0PE4k7LvQFXAjuZ8kYFrMR4YWhiKpWpL9UTBvZ7m qk8KFyM10DuEJNIBnRKAozmeWOLsaRT5BF34OdpSj6Zv4Gqt85+FGlDU+TUek9WwkkfR jZ7v8VD7HnnFbwgxTvyBeOotqiXojc6x8i1KKOK4cVeQIekGTw1TCNcAMW/CMpvd+6RP tm9qSDCStEi3cagBGLSl7+rtLDZzX8+eMCzoO28n1Ii8zBPZJRPmgHsTk8uv3JTt6aUv wyhvmP1oQ5xcemAq48IGapmsXw3yUdDwPENB6AdF3PlELk7SIAKnvWNK5LHjesLGFh1U 9+Jg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=4+X4WteNsgQ19+v1jrZ7Ekzjl0pM0a2tSBb6kLiTT48=; b=P7ECMV3426VZo69DZIwo/Y7R8Gz4KmDl9/V7mbACRjww62y9HT/RkbjdrmMDH0RtNl ZCUID9rXSbu2aR/RvVH0EvzNC0A7bdRtENFdUoag0Unn/3K1JxyEw65KIX43nbq9M802 yjBzfKANcqkxMw+ZC+xaP7uWz5lqILJJBUWWsETt7B240gianvjpI4W26UsLtaL6l79J 8tybz+Qvv2gsDoq3OuSbZedtIu4+LwmHuIYP/vn2XeLRa/YRClLLm53IlK9KVSqwUIbd R8mjnkepdg88veeJqbaRah12Itkr0/t2HCuElOO52i8u0T6M/bi5YUjudAVasTEZ+LHn xJ4A== X-Gm-Message-State: AOAM531DW6rAA62dLkwQpEe0BkcI16UxE9PP0FPLJnRao13IiHY6UYnh KLR/cADbAJua9Zzyszx2Vbv11Q== X-Google-Smtp-Source: ABdhPJzBhRA/mYegQ6Y3SCHv8vvyMaFup+8Bx9cPBeG9nbr9M1kzHbHa1+EnzLI/fQPr8l4kD42yUg== X-Received: by 2002:a37:468c:: with SMTP id t134mr12536249qka.357.1620647654876; Mon, 10 May 2021 04:54:14 -0700 (PDT) Received: from ziepe.ca (hlfxns017vw-47-55-113-94.dhcp-dynamic.fibreop.ns.bellaliant.net. [47.55.113.94]) by smtp.gmail.com with ESMTPSA id 189sm11286888qkd.51.2021.05.10.04.54.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 May 2021 04:54:14 -0700 (PDT) Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1lg4UH-004Bs3-DG; Mon, 10 May 2021 08:54:13 -0300 Date: Mon, 10 May 2021 08:54:13 -0300 From: Jason Gunthorpe To: Christoph Hellwig Cc: Joerg Roedel , Alex Williamson , David Woodhouse , Lu Baolu , Will Deacon , Kirti Wankhede , Jacob Pan , "Raj, Ashok" , "Wu, Hao" , "Jiang, Dave" , "Tian, Kevin" , linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, kvm@vger.kernel.org Subject: Re: more iommu dead code removal Message-ID: <20210510115413.GE2047089@ziepe.ca> References: <20210510065405.2334771-1-hch@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210510065405.2334771-1-hch@lst.de> Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Mon, May 10, 2021 at 08:53:59AM +0200, Christoph Hellwig wrote: > Hi all, > > this is another series to remove dead code from the IOMMU subsystem, > this time mostly about the hacky code to pass an iommu device in > struct mdev_device and huge piles of support code. All of this was > merged two years ago and (fortunately) never got used. Yes, I looked at this too. Intel has been merging dead code for a while now. Ostensibly to prepare to get PASID support in.. But the whole PASID thing looks to be redesigned from what was originally imagined. At least from VFIO I think the PASID support should not use this hacky stuff, /dev/ioasid should provide a clean solution Jason