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,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,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 76A12C11F66 for ; Tue, 29 Jun 2021 04:03:47 +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 0B98D61D4B for ; Tue, 29 Jun 2021 04:03:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0B98D61D4B 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 B860E82628; Tue, 29 Jun 2021 04:03:46 +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 Nf0Lh37j6-Ku; Tue, 29 Jun 2021 04:03:46 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp1.osuosl.org (Postfix) with ESMTPS id C2F848254D; Tue, 29 Jun 2021 04:03:45 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id E1327C000E; Tue, 29 Jun 2021 04:03:44 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 674FAC0010 for ; Tue, 29 Jun 2021 04:03:43 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 480FF40224 for ; Tue, 29 Jun 2021 04:03:43 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp4.osuosl.org (amavisd-new); dkim=pass (1024-bit key) header.d=redhat.com Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id F4fon5pshRxk for ; Tue, 29 Jun 2021 04:03:42 +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 [170.10.133.124]) by smtp4.osuosl.org (Postfix) with ESMTPS id 635594026A for ; Tue, 29 Jun 2021 04:03:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1624939421; 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=v+g48Xk6aSFcuGIkt+/DaIL+8u6+RW2FB0ohInQkXMo=; b=HakUBONhNHm6IC+59YeTj095UOc7S7n+V53lzuwQVxEN7MVQlnuV/bHUT3a53z4oa65k2n rZkY6Kaeb5ucQGLq7xELr0ZDB6TVeGGhCoMW/RyA7NCuPvO2KRz57FR+785SyVT1+7JZ9a SaC4Hpvv3e9IaiTLkGVXuQPJ07UjWnk= 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-330-txuPywq6OPOWgD1p4j_Gog-1; Tue, 29 Jun 2021 00:03:39 -0400 X-MC-Unique: txuPywq6OPOWgD1p4j_Gog-1 Received: by mail-pl1-f199.google.com with SMTP id e14-20020a170902784eb0290102b64712f9so6675075pln.10 for ; Mon, 28 Jun 2021 21:03:39 -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=v+g48Xk6aSFcuGIkt+/DaIL+8u6+RW2FB0ohInQkXMo=; b=etsEmBX7RRVSsCeEjVknv0uoFTr7pOl3K/l3KnnCWWlpUtedQ/7ZtILIqlq8YkBgqG mKVZRvEDVZKomOnH8oAU9yM3buvGbX2PeiAg9ydjBC5VMIEZpwJX+YTy1lVlmMsAwa04 iRs84NuYCuFRO5yq3cyuhG/WkJyIdNpdeLGRDE4tD+vznFRQjL+SYWKp8WS1yJ897jnn BkXqOUzuPVr8KbZSVGaWKpaNQDztTHXzJGlIuZlouEr8oo4yKmhTQDQSnZJ2wuVVmTWd xJ7tBjXwn/b5+woRf30rUkrnI73qSbz4o1X3zew6HlB+8IhOsG3hVqI1+fZT4HNE92q1 JM3g== X-Gm-Message-State: AOAM531IEJG+l4yEhA7Mq+nFOBGYAUPGahbC1sICguVqXZ0DDKq1hbnU rVroV83b0es7Q2c4dJs4myv1x+WMnbSlkW7a5Jnlto6DmvRokHXRtACB9LgGzo18iWCH/kbU+BQ RqLNsfy9B8T68dx+enrT0PdfStCk2yQ== X-Received: by 2002:a17:90a:3d47:: with SMTP id o7mr41873367pjf.68.1624939418475; Mon, 28 Jun 2021 21:03:38 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxKtTxOUZyWPHTglSm78/VChBvM+Z/ZClGizEzsTPbjS/HVYSHDloQPPNl7gVZByIo2yALsfw== X-Received: by 2002:a17:90a:3d47:: with SMTP id o7mr41873326pjf.68.1624939418245; Mon, 28 Jun 2021 21:03:38 -0700 (PDT) Received: from wangxiaodeMacBook-Air.local ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id e2sm16252405pgh.5.2021.06.28.21.03.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 28 Jun 2021 21:03:37 -0700 (PDT) Subject: Re: [PATCH v8 09/10] vduse: Introduce VDUSE - vDPA Device in Userspace To: Yongji Xie References: <20210615141331.407-1-xieyongji@bytedance.com> <0aeb7cb7-58e5-1a95-d830-68edd7e8ec2e@redhat.com> <48cab125-093b-2299-ff9c-3de8c7c5ed3d@redhat.com> From: Jason Wang Message-ID: Date: Tue, 29 Jun 2021 12:03:25 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: 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: kvm , "Michael S. Tsirkin" , virtualization , Christian Brauner , Jonathan Corbet , Matthew Wilcox , Christoph Hellwig , Dan Carpenter , Stefano Garzarella , Al Viro , Stefan Hajnoczi , songmuchun@bytedance.com, Jens Axboe , Greg KH , Randy Dunlap , linux-kernel , iommu@lists.linux-foundation.org, bcrl@kvack.org, netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, =?UTF-8?Q?Mika_Penttil=c3=a4?= 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="utf-8"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" CuWcqCAyMDIxLzYvMjkg5LiK5Y2IMTE6NTYsIFlvbmdqaSBYaWUg5YaZ6YGTOgo+IE9uIFR1ZSwg SnVuIDI5LCAyMDIxIGF0IDExOjI5IEFNIEphc29uIFdhbmcgPGphc293YW5nQHJlZGhhdC5jb20+ IHdyb3RlOgo+Pgo+PiDlnKggMjAyMS82LzI5IOS4iuWNiDEwOjI2LCBZb25namkgWGllIOWGmemB kzoKPj4+IE9uIE1vbiwgSnVuIDI4LCAyMDIxIGF0IDEyOjQwIFBNIEphc29uIFdhbmcgPGphc293 YW5nQHJlZGhhdC5jb20+IHdyb3RlOgo+Pj4+IOWcqCAyMDIxLzYvMjUg5LiL5Y2IMTI6MTksIFlv bmdqaSBYaWUg5YaZ6YGTOgo+Pj4+Pj4gMmIpIGZvciBzZXRfc3RhdHVzKCk6IHNpbXBseSByZWxh eSB0aGUgbWVzc2FnZSB0byB1c2Vyc3BhY2UsIHJlcGx5IGlzIG5vCj4+Pj4+PiBuZWVkZWQuIFVz ZXJzcGFjZSB3aWxsIHVzZSBhIGNvbW1hbmQgdG8gdXBkYXRlIHRoZSBzdGF0dXMgd2hlbiB0aGUK Pj4+Pj4+IGRhdGFwYXRoIGlzIHN0b3AuIFRoZSB0aGUgc3RhdHVzIGNvdWxkIGJlIGZldGNoZWQg dmlhIGdldF9zdGF0cygpLgo+Pj4+Pj4KPj4+Pj4+IDJiIGxvb2tzIG1vcmUgc3BlYyBjb21wbGFp bnQuCj4+Pj4+Pgo+Pj4+PiBMb29rcyBnb29kIHRvIG1lLiBBbmQgSSB0aGluayB3ZSBjYW4gdXNl IHRoZSByZXBseSBvZiB0aGUgbWVzc2FnZSB0bwo+Pj4+PiB1cGRhdGUgdGhlIHN0YXR1cyBpbnN0 ZWFkIG9mIGludHJvZHVjaW5nIGEgbmV3IGNvbW1hbmQuCj4+Pj4+Cj4+Pj4gSnVzdCBub3RpY2Ug dGhpcyBwYXJ0IGluIHZpcnRpb19maW5hbGl6ZV9mZWF0dXJlcygpOgo+Pj4+Cj4+Pj4gICAgICAg ICAgICB2aXJ0aW9fYWRkX3N0YXR1cyhkZXYsIFZJUlRJT19DT05GSUdfU19GRUFUVVJFU19PSyk7 Cj4+Pj4gICAgICAgICAgICBzdGF0dXMgPSBkZXYtPmNvbmZpZy0+Z2V0X3N0YXR1cyhkZXYpOwo+ Pj4+ICAgICAgICAgICAgaWYgKCEoc3RhdHVzICYgVklSVElPX0NPTkZJR19TX0ZFQVRVUkVTX09L KSkgewo+Pj4+Cj4+Pj4gU28gd2Ugbm8gcmVwbHkgZG9lc24ndCB3b3JrIGZvciBGRUFUVVJFU19P Sy4KPj4+Pgo+Pj4+IFNvIG15IHVuZGVyc3RhbmRpbmcgaXM6Cj4+Pj4KPj4+PiAxKSBXZSBtdXN0 IG5vdCB1c2Ugbm9yZXBseSBmb3Igc2V0X3N0YXR1cygpCj4+Pj4gMikgV2UgY2FuIHVzZSBub3Jl cGx5IGZvciBnZXRfc3RhdHVzKCksIGJ1dCBpdCByZXF1aXJlcyBhIG5ldyBpb2N0bCB0bwo+Pj4+ IHVwZGF0ZSB0aGUgc3RhdHVzLgo+Pj4+Cj4+Pj4gU28gaXQgbG9va3MgdG8gbWUgd2UgbmVlZCBz eW5jaHJvbml6ZSBmb3IgYm90aCBnZXRfc3RhdHVzKCkgYW5kCj4+Pj4gc2V0X3N0YXR1cygpLgo+ Pj4+Cj4+PiBXZSBzaG91bGQgbm90IHNlbmQgbWVzc2FnZXMgdG8gdXNlcnNwYWNlIGluIHRoZSBG RUFUVVJFU19PSyBjYXNlLiBTbwo+Pj4gdGhlIHN5bmNocm9uaXphdGlvbiBpcyBub3QgbmVjZXNz YXJ5Lgo+Pgo+PiBBcyBkaXNjdXNzZWQgcHJldmlvdXNseSwgdGhlcmUgY291bGQgYmUgYSBkZXZp Y2UgdGhhdCBtYW5kYXRlcyBzb21lCj4+IGZlYXR1cmVzIChWSVJUSU9fRl9SSU5HX1BBQ0tFRCku IFNvIGl0IGNhbiBjaG9vc2UgdG8gbm90IGFjY2VwdAo+PiBGRUFUVVJFU19PSyBpcyBwYWNrZWQg dmlydHF1ZXVlIGlzIG5vdCBuZWdvdGlhdGVkLgo+Pgo+PiBJbiB0aGlzIGNhc2Ugd2UgbmVlZCB0 byByZWxheSB0aGUgbWVzc2FnZSB0byB1c2Vyc3BhY2UuCj4+Cj4gT0ssIEkgc2VlLiBJZiBzbywg SSBwcmVmZXIgdG8gb25seSB1c2Ugbm9yZXBseSBmb3Igc2V0X3N0YXR1cygpLiBXZSBkbwo+IG5v dCBzZXQgdGhlIHN0YXR1cyBiaXQgaWYgdGhlIG1lc3NhZ2UgaXMgZmFpbGVkLiBJbiB0aGlzIHdh eSwgd2UgZG9uJ3QKPiBuZWVkIHRvIGNoYW5nZSBsb3RzIG9mIHZpcnRpbyBjb3JlIGNvZGVzIHRv IGhhbmRsZSB0aGUgZmFpbHVyZSBvZgo+IHNldF9zdGF0dXMoKS9nZXRfc3RhdHVzKCkuCgoKSXQg c2hvdWxkIHdvcmsuCgpUaGFua3MKCgo+Cj4gVGhhbmtzLAo+IFlvbmdqaQo+CgpfX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwppb21tdSBtYWlsaW5nIGxpc3QK aW9tbXVAbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5k YXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vaW9tbXU=