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=-5.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, 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 05A0FC4363D for ; Fri, 25 Sep 2020 10:22:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BDBF7221E5 for ; Fri, 25 Sep 2020 10:22:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="WCg5RZZ+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727346AbgIYKW2 (ORCPT ); Fri, 25 Sep 2020 06:22:28 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:45767 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727132AbgIYKW1 (ORCPT ); Fri, 25 Sep 2020 06:22:27 -0400 Dkim-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1601029346; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=FIrDkYdRBbVhi3DlgkbBKaCC5KZCzUdxrIcyXtujywg=; b=WCg5RZZ+4EPphcYF5Zc8L25rio9ikwsJzIZZks4MQjeQcpSauuq7Omw60DRxKZ4y8JbQg/ ZPk+ijHpE2wP8wsBBWbAPk/vgw4pX6qBQkyCWqCKUDZYprJKIlNoVHgqshGecAeVCqpKQJ oyUQQ8wNHP15ji8nhRpjnsLAaLW5Www= Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-468-W58zwvivOE64SJCa44Cpsw-1; Fri, 25 Sep 2020 06:22:25 -0400 X-MC-Unique: W58zwvivOE64SJCa44Cpsw-1 Received: by mail-wm1-f69.google.com with SMTP id t10so656903wmi.9 for ; Fri, 25 Sep 2020 03:22:25 -0700 (PDT) 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=FIrDkYdRBbVhi3DlgkbBKaCC5KZCzUdxrIcyXtujywg=; b=tS58exF1TmIpy2pXPOM8AJnlAFi4AUavCk6wXnXt88SynE9DCIGXJ7KaAcwLX15vCV AG9ihWrpfYLUivDbzLKb2rSan48WOcm2Qty+L1NY/XswOqgUfmVV3jG8XOAUoEdM+8/7 vvy5uLzCUjFn/b0iWu0ru8X08Rz/UWxRmtmPwxWcw4TXzIIjq0Ni9qp1cjoZIbAq63Rq j+wUyIpDAnYFCEn0E0cPjVJeVz3zxYbfQek2rpyZ5oooBD0i/AKHogS9FfsWunRqGu4a itepjiATDbQFyvA0/6oO332A2BbxiV3chQ3JwsDcyMkc27U1hWTt1Ko5xy9nnL+J4v5X JUrQ== X-Gm-Message-State: AOAM5323rpvVT8eHtozrCI53JJc9K/guAtQ4ne6gDyTdPQwcRIlCWiRN cmeloB6qBKuVyyTzl/4WBesIWmheMNIlEfI/ejsY83BS+gXnhJ9i3YPvgYNwB44V4sADMcyMWy5 wVLgDR6zpI0/Ej9a7JE5R X-Received: by 2002:a1c:9a57:: with SMTP id c84mr2311712wme.136.1601029344134; Fri, 25 Sep 2020 03:22:24 -0700 (PDT) X-Google-Smtp-Source: ABdhPJx/J1hHVBw+R8oMJc/+peFSRFq7cwzBLkEQMc+s1atOIZTdN1uBg5mFmmxkcJWGpJb6G3bMjg== X-Received: by 2002:a1c:9a57:: with SMTP id c84mr2311686wme.136.1601029343977; Fri, 25 Sep 2020 03:22:23 -0700 (PDT) Received: from redhat.com (bzq-79-179-71-128.red.bezeqint.net. [79.179.71.128]) by smtp.gmail.com with ESMTPSA id c14sm2297007wrv.12.2020.09.25.03.22.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Sep 2020 03:22:23 -0700 (PDT) Date: Fri, 25 Sep 2020 06:22:20 -0400 From: "Michael S. Tsirkin" To: Joerg Roedel Cc: Auger Eric , Jean-Philippe Brucker , iommu@lists.linux-foundation.org, virtualization@lists.linux-foundation.org, virtio-dev@lists.oasis-open.org, linux-pci@vger.kernel.org, bhelgaas@google.com, jasowang@redhat.com, kevin.tian@intel.com, sebastien.boeuf@intel.com, lorenzo.pieralisi@arm.com Subject: Re: [PATCH v3 0/6] Add virtio-iommu built-in topology Message-ID: <20200925062122-mutt-send-email-mst@kernel.org> References: <20200821131540.2801801-1-jean-philippe@linaro.org> <20200924045958-mutt-send-email-mst@kernel.org> <20200924092129.GH27174@8bytes.org> <20200924053159-mutt-send-email-mst@kernel.org> <20200924100255.GM27174@8bytes.org> <20200924083918-mutt-send-email-mst@kernel.org> <20200924125046.GR27174@8bytes.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200924125046.GR27174@8bytes.org> Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On Thu, Sep 24, 2020 at 02:50:46PM +0200, Joerg Roedel wrote: > On Thu, Sep 24, 2020 at 08:41:21AM -0400, Michael S. Tsirkin wrote: > > But this has nothing to do with Linux. There is also no guarantee that > > the two committees will decide to use exactly the same format. Once one > > of them sets the format in stone, we can add support for that format to > > linux. If another one is playing nice and uses the same format, we can > > use the same parsers. If it doesn't linux will have to follow suit. > > Or Linux decides to support only one of the formats, which would then be > ACPI. > > Regards, > > Joerg It's really up to hypervisors not guests, linux as a guest can for sure refuse to work somewhere, but that's normally not very attractive. -- MST