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=-5.7 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 93B63C47099 for ; Fri, 4 Jun 2021 01:11:21 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (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 3B1516140D for ; Fri, 4 Jun 2021 01:11:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3B1516140D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.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 smtp1.osuosl.org (Postfix) with ESMTP id F154A84036; Fri, 4 Jun 2021 01:11:20 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id tIHg2DCVMLCT; Fri, 4 Jun 2021 01:11:20 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp1.osuosl.org (Postfix) with ESMTP id CEEB783DEB; Fri, 4 Jun 2021 01:11:19 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id B2369C000E; Fri, 4 Jun 2021 01:11:19 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [IPv6:2605:bc80:3010::136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 47E25C0001 for ; Fri, 4 Jun 2021 01:11:19 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 3BF536F931 for ; Fri, 4 Jun 2021 01:11:19 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp3.osuosl.org (amavisd-new); dkim=pass (1024-bit key) header.d=redhat.com Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vuBWdG39m9DB for ; Fri, 4 Jun 2021 01:11:18 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by smtp3.osuosl.org (Postfix) with ESMTPS id E14FB60AF2 for ; Fri, 4 Jun 2021 01:11:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1622769076; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=74wa3D7052FGdwsOb19pvsgbuYGA5vLypJgGwvpg9kA=; b=a37wmN21NMiNqjs6CSHLYuHZjqb6wCLH+LZfaXhCht2TsQxTxs6l+n0xHrtrQ4F8j+lSAB eF0uY1mVHBer36oeFvnSDcASegOzFoJxD3FRjO7xf/IW7lZCPecPzXfzHCyeMcoUbBz68G M2URL10SkPoKdMHoX10Eh8hftny+ZJw= Received: from mail-pl1-f199.google.com (mail-pl1-f199.google.com [209.85.214.199]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-561-CiP0Pt11NaSj2spCZ61Icg-1; Thu, 03 Jun 2021 21:11:14 -0400 X-MC-Unique: CiP0Pt11NaSj2spCZ61Icg-1 Received: by mail-pl1-f199.google.com with SMTP id u1-20020a1709027141b02901040cac08fdso3387082plm.12 for ; Thu, 03 Jun 2021 18:11:14 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=74wa3D7052FGdwsOb19pvsgbuYGA5vLypJgGwvpg9kA=; b=ChbN5QTZ052+mBXRHR8nL9gWHPhRQBIV4NdImQV9y1pTNnAn/jL3wW66YiT/TmYa4w 6J8F+nncMo655cGl1ejifdHje/Mi20CXPpif2O+kE2Ivvamnn3kuqBzpgtTd9cCG0X/D NGm8bgrw/VE7j2MzE0U0awqpgFClQuV7azw0V/KsvxFmR2nQDP7J452sdLyMDuDsS/wY TOLWOf517uaBQ7w1+I42JMEptYLh5VBAIWLT88vfMYjcrjZnE7Jt0zT4ThtvRwIrClax oO7xrgSqfssdnC1ge69lUOAZcz3tfrt0bPyi4tjg7ZJO1TP6euYvLnsXzcRJkEpIBmZB 5X5g== X-Gm-Message-State: AOAM531DEvr6jmOLa776RkewOMxj2LCm7KygKCCAlJQVgzypg5gw0zqv Kuxoz6IbLAXgT4EVQ5MiW4KK7iZSd2TJPPKaChTSSyh6gVzKcDQRLeL21QjQ2nJnCY80qQDUedK w3i8elhDnLzzBM3BAEHfp1cGg3xzaGQ== X-Received: by 2002:a63:370b:: with SMTP id e11mr2255873pga.356.1622769073849; Thu, 03 Jun 2021 18:11:13 -0700 (PDT) X-Google-Smtp-Source: ABdhPJw19wf1A8+65Q36xarUBfhf8NPj5f2hsFRG2/Iexl5uV4W9R5ePiMPVn1Z2bNWIP1oHtD7E3w== X-Received: by 2002:a63:370b:: with SMTP id e11mr2255853pga.356.1622769073569; Thu, 03 Jun 2021 18:11:13 -0700 (PDT) Received: from wangxiaodeMacBook-Air.local ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id h18sm248362pgl.87.2021.06.03.18.11.08 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 03 Jun 2021 18:11:13 -0700 (PDT) Subject: Re: [RFC] /dev/ioasid uAPI proposal To: Jason Gunthorpe References: <20210602160140.GV1002214@nvidia.com> <20210602111117.026d4a26.alex.williamson@redhat.com> <20210602173510.GE1002214@nvidia.com> <20210602120111.5e5bcf93.alex.williamson@redhat.com> <20210602180925.GH1002214@nvidia.com> <20210602130053.615db578.alex.williamson@redhat.com> <20210602195404.GI1002214@nvidia.com> <20210602143734.72fb4fa4.alex.williamson@redhat.com> <6a9426d7-ed55-e006-9c4c-6b7c78142e39@redhat.com> <20210603130927.GZ1002214@nvidia.com> From: Jason Wang Message-ID: <65614634-1db4-7119-1a90-64ba5c6e9042@redhat.com> Date: Fri, 4 Jun 2021 09:11:03 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.10.2 MIME-Version: 1.0 In-Reply-To: <20210603130927.GZ1002214@nvidia.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jasowang@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Cc: Jean-Philippe Brucker , "Tian, Kevin" , "Jiang, Dave" , "Raj, Ashok" , "kvm@vger.kernel.org" , Jonathan Corbet , David Woodhouse , LKML , "iommu@lists.linux-foundation.org" , Alex Williamson , Kirti Wankhede , Robin Murphy , David Gibson 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-Transfer-Encoding: base64 Content-Type: text/plain; charset="gbk"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" CtTaIDIwMjEvNi8zIM/Czuc5OjA5LCBKYXNvbiBHdW50aG9ycGUg0LS1wDoKPiBPbiBUaHUsIEp1 biAwMywgMjAyMSBhdCAxMDo1Mjo1MUFNICswODAwLCBKYXNvbiBXYW5nIHdyb3RlOgo+Cj4+IEJh c2ljYWxseSwgd2UgZG9uJ3Qgd2FudCB0byBib3RoZXIgd2l0aCBwc2V1ZG8gS1ZNIGRldmljZSBs aWtlIHdoYXQgVkZJTwo+PiBkaWQuIFNvIGZvciBzaW1wbGljaXR5LCB3ZSBydWxlcyBvdXQgdGhl IElPTU1VIHRoYXQgY2FuJ3QgZW5mb3JjZSBjb2hlcmVuY3kKPj4gaW4gdmhvc3QtdkRQQSBpZiB0 aGUgcGFyZW50IHB1cmVseSBkZXBlbmRzIG9uIHRoZSBwbGF0Zm9ybSBJT01NVToKPiBWRFBBIEhX IGNhbm5vdCBpc3N1ZSBuby1zbm9vcCBUTFBzIGluIHRoZSBmaXJzdCBwbGFjZS4KCgpOb3RlIHRo YXQgdmlydGlvL3ZEUEEgaXMgbm90IG5lY2Vzc2FyaWx5IGEgUENJIGRldmljZS4KCgo+Cj4gdmly dGlvIGRvZXMgbm90IGRlZmluZSBhIHByb3RvY29sIHRvIGRpc2NvdmVyIHN1Y2ggYSBmdW5jdGlv bmFsaXR5LAoKCkFjdHVhbGx5IHdlIGhhZDoKClZJUlRJT19GX0FDQ0VTU19QTEFURk9STSgzMykK VGhpcyBmZWF0dXJlIGluZGljYXRlcyB0aGF0IHRoZSBkZXZpY2UgY2FuIGJlIHVzZWQgb24gYSBw bGF0Zm9ybSB3aGVyZSAKZGV2aWNlIGFjY2VzcyB0byBkYXRhIGluIG1lbW9yeSBpcyBsaW1pdGVk IGFuZC9vciB0cmFuc2xhdGVkLiBFLmcuIHRoaXMgCmlzIHRoZSBjYXNlIGlmIHRoZSBkZXZpY2Ug Y2FuIGJlIGxvY2F0ZWQgYmVoaW5kIGFuIElPTU1VIHRoYXQgdHJhbnNsYXRlcyAKYnVzIGFkZHJl c3NlcyBmcm9tIHRoZSBkZXZpY2UgaW50byBwaHlzaWNhbCBhZGRyZXNzZXMgaW4gbWVtb3J5LCBp ZiB0aGUgCmRldmljZSBjYW4gYmUgbGltaXRlZCB0byBvbmx5IGFjY2VzcyBjZXJ0YWluIG1lbW9y eSBhZGRyZXNzZXMgb3IgaWYgCnNwZWNpYWwgY29tbWFuZHMgc3VjaCBhcyBhIGNhY2hlIGZsdXNo IGNhbiBiZSBuZWVkZWQgdG8gc3luY2hyb25pc2UgZGF0YSAKaW4gbWVtb3J5IHdpdGggdGhlIGRl dmljZS4KCgo+IG5vciBkbyBhbnkgdmlydGlvIGRyaXZlcnMgaW1wbGVtZW50IHRoZSByZXF1aXJl ZCBwbGF0Zm9ybSBzcGVjaWZpYwo+IGNhY2hlIGZsdXNoaW5nIHRvIG1ha2Ugbm8tc25vb3AgVExQ cyB3b3JrLgoKCkkgZG9uJ3QgZ2V0IHdoeSB2aXJ0aW8gZHJpdmVycyBuZWVkcyB0byBkbyB0aGF0 LiBJIHRoaW5rIERNQSBBUEkgc2hvdWxkIApoaWRlIHRob3NlIGFyY2gvcGxhdGZvcm0gc3BlY2lm aWMgc3R1ZmZzIGZyb20gdXMuCgoKPgo+IEl0IGlzIGZ1bmRhbWVudGFsbHkgcGFydCBvZiB0aGUg dmlydGlvIEhXIFBDSSBBUEkgdGhhdCBhIGRldmljZSB2ZW5kb3IKPiBjYW5ub3QgYWx0ZXIuCgoK VGhlIHNwZWMgZG9lc24ndCBmb3JiaWQgdGhpcywgYW5kIGl0IGp1c3QgbGVhdmUgdGhlIGRldGVj dGlvbiBhbmQgYWN0aW9uIAp0byB0aGUgZHJpdmVyIGluIGEgcGxhdGZvcm0gc3BlY2lmaWMgd2F5 LgoKVGhhbmtzCgoKPgo+IEJhc2ljYWxseSBzaW5jZSB3ZSBhbHJlYWR5IGtub3cgdGhhdCB0aGUg dmlydGlvIGtlcm5lbCBkcml2ZXJzIGRvIG5vdAo+IGNhbGwgdGhlIGNhY2hlIGZsdXNoIGluc3Ry dWN0aW9uIHdlIGRvbid0IG5lZWQgdGhlIHdlaXJkIEtWTSBsb2dpYyB0bwo+IHR1cm4gaXQgb24g YXQgYWxsLgo+Cj4gRW5mb3JjaW5nIG5vLXNub29wIGF0IHRoZSBJT01NVSBoZXJlIGlzIHJlZHVu ZGFudC9jb25mdXNpbmcuCj4KPiBKYXNvbgo+CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fXwppb21tdSBtYWlsaW5nIGxpc3QKaW9tbXVAbGlzdHMubGludXgt Zm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4v bGlzdGluZm8vaW9tbXU=