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=-5.0 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_RED,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 A6647C47089 for ; Fri, 28 May 2021 01:34:02 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (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 2B5E7613B4 for ; Fri, 28 May 2021 01:34:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2B5E7613B4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=virtualization-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 9524040E7F; Fri, 28 May 2021 01:34:01 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org 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 WMaRcnGPtuer; Fri, 28 May 2021 01:34:00 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp4.osuosl.org (Postfix) with ESMTP id B293F405AA; Fri, 28 May 2021 01:33:59 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 4EFF3C0022; Fri, 28 May 2021 01:33:59 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [IPv6:2605:bc80:3010::136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 4B58FC000D for ; Fri, 28 May 2021 01:33:57 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 2A48660D88 for ; Fri, 28 May 2021 01:33:57 +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 eOwsXbehLz6R for ; Fri, 28 May 2021 01:33:56 +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 smtp3.osuosl.org (Postfix) with ESMTPS id 1214C60683 for ; Fri, 28 May 2021 01:33:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1622165634; 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=8EflzxBdWy0wiqxEhDGP+Q2T2EKetKqpgEpZkAeYf/A=; b=S4yJIAdo04HShBOeEztagfuSKahh7K8Fs6P3wYnWR3yYdOQycT+MVrrAoZUfJ93bznh5cW JnMj6D9FZ/Zfkkw+6343e4kc/73qiP1AixXluONg6+MbYoGrOMQN2dxECYmzxslQ0tnPKU CoSeACifCz8qPc/Y4ykVSaIX221zrpc= Received: from mail-pg1-f198.google.com (mail-pg1-f198.google.com [209.85.215.198]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-582-XqQheSX7Pri-9Fu5kFCqVg-1; Thu, 27 May 2021 21:33:53 -0400 X-MC-Unique: XqQheSX7Pri-9Fu5kFCqVg-1 Received: by mail-pg1-f198.google.com with SMTP id b71-20020a63344a0000b029021593d6428aso1008252pga.2 for ; Thu, 27 May 2021 18:33:52 -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=8EflzxBdWy0wiqxEhDGP+Q2T2EKetKqpgEpZkAeYf/A=; b=FuP0rCbxbAKOBkLoZV8MTvGhmLC8Pb6/EoO0B+W687sNOSngs+qO4b+UE9XBgiJUdH I5oz3InOODlBTGIw8qBBoBzlkO99ZdHeRtZ0lTakdlUT4ce8Pyf6dYxpQ6Giw1A1IIB3 9KYmS8l+HEOOhk2oh8jkZidbvWJjY0JJ3JApQX6T4XuziNkPd5Ck4Awzs0LHX06A02Yz datXluOhFFDhM8NJuIhTNYQWjubi3w/7MJ2Mew1h5AbCZkPhVpzwFbUp1MS5jAITNfpz UKM/dtEuZA7DfCWDbCbGu7J66CANqwKlmIN89h7XFvvAGLGP9k7NWkGz1FenXq9ncJCa im1A== X-Gm-Message-State: AOAM5321c8RAdvETH6fvRhdugAFnbMor8J4tGf/ei45JkPIggoy8oleJ RSpLTyv6RWGzLjaBd5//dpltyqHPM+DSEkdJFjGz0HVIiraC8NM9Y4w1sIo0tvfb7OzBINDWmRb rPjnEUFwHvSL5+Y+CwgMrTN52UhgsWs6Yk8j1bhNo6A== X-Received: by 2002:a17:90a:4d01:: with SMTP id c1mr1544241pjg.113.1622165632002; Thu, 27 May 2021 18:33:52 -0700 (PDT) X-Google-Smtp-Source: ABdhPJydC/stmtwVBAw7vn0dDxdtXv7rokRxoXkgRqgTNFUSMcTPVSj5vrj1iqRSI/twfonCL/POEw== X-Received: by 2002:a17:90a:4d01:: with SMTP id c1mr1544208pjg.113.1622165631682; Thu, 27 May 2021 18:33:51 -0700 (PDT) Received: from wangxiaodeMacBook-Air.local ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id g4sm2964265pgu.46.2021.05.27.18.33.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 27 May 2021 18:33:51 -0700 (PDT) Subject: Re: [PATCH v7 11/12] vduse: Introduce VDUSE - vDPA Device in Userspace To: Yongji Xie References: <20210517095513.850-1-xieyongji@bytedance.com> <20210517095513.850-12-xieyongji@bytedance.com> <3740c7eb-e457-07f3-5048-917c8606275d@redhat.com> <5a68bb7c-fd05-ce02-cd61-8a601055c604@redhat.com> <00ded99f-91b6-ba92-5d92-2366b163f129@redhat.com> <3cc7407d-9637-227e-9afa-402b6894d8ac@redhat.com> From: Jason Wang Message-ID: Date: Fri, 28 May 2021 09:33:43 +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: 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: Jens Axboe , Jonathan Corbet , linux-kernel , kvm , "Michael S. Tsirkin" , netdev@vger.kernel.org, joro@8bytes.org, Randy Dunlap , iommu@lists.linux-foundation.org, Matthew Wilcox , virtualization , Christoph Hellwig , Christian Brauner , bcrl@kvack.org, Al Viro , Stefan Hajnoczi , linux-fsdevel@vger.kernel.org, Dan Carpenter , =?UTF-8?Q?Mika_Penttil=c3=a4?= X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization 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: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" CuWcqCAyMDIxLzUvMjcg5LiL5Y2INjoxNCwgWW9uZ2ppIFhpZSDlhpnpgZM6Cj4gT24gVGh1LCBN YXkgMjcsIDIwMjEgYXQgNDo0MyBQTSBKYXNvbiBXYW5nIDxqYXNvd2FuZ0ByZWRoYXQuY29tPiB3 cm90ZToKPj4KPj4g5ZyoIDIwMjEvNS8yNyDkuIvljYg0OjQxLCBKYXNvbiBXYW5nIOWGmemBkzoK Pj4+IOWcqCAyMDIxLzUvMjcg5LiL5Y2IMzozNCwgWW9uZ2ppIFhpZSDlhpnpgZM6Cj4+Pj4gT24g VGh1LCBNYXkgMjcsIDIwMjEgYXQgMTo0MCBQTSBKYXNvbiBXYW5nIDxqYXNvd2FuZ0ByZWRoYXQu Y29tPiB3cm90ZToKPj4+Pj4g5ZyoIDIwMjEvNS8yNyDkuIvljYgxOjA4LCBZb25namkgWGllIOWG memBkzoKPj4+Pj4+IE9uIFRodSwgTWF5IDI3LCAyMDIxIGF0IDE6MDAgUE0gSmFzb24gV2FuZyA8 amFzb3dhbmdAcmVkaGF0LmNvbT4KPj4+Pj4+IHdyb3RlOgo+Pj4+Pj4+IOWcqCAyMDIxLzUvMjcg 5LiL5Y2IMTI6NTcsIFlvbmdqaSBYaWUg5YaZ6YGTOgo+Pj4+Pj4+PiBPbiBUaHUsIE1heSAyNywg MjAyMSBhdCAxMjoxMyBQTSBKYXNvbiBXYW5nIDxqYXNvd2FuZ0ByZWRoYXQuY29tPgo+Pj4+Pj4+ PiB3cm90ZToKPj4+Pj4+Pj4+IOWcqCAyMDIxLzUvMTcg5LiL5Y2INTo1NSwgWGllIFlvbmdqaSDl hpnpgZM6Cj4+Pj4+Pj4+Pj4gKwo+Pj4+Pj4+Pj4+ICtzdGF0aWMgaW50IHZkdXNlX2Rldl9tc2df c3luYyhzdHJ1Y3QgdmR1c2VfZGV2ICpkZXYsCj4+Pj4+Pj4+Pj4gKyAgICAgICAgICAgICAgICAg ICAgICAgICAgIHN0cnVjdCB2ZHVzZV9kZXZfbXNnICptc2cpCj4+Pj4+Pj4+Pj4gK3sKPj4+Pj4+ Pj4+PiArICAgICBpbml0X3dhaXRxdWV1ZV9oZWFkKCZtc2ctPndhaXRxKTsKPj4+Pj4+Pj4+PiAr ICAgICBzcGluX2xvY2soJmRldi0+bXNnX2xvY2spOwo+Pj4+Pj4+Pj4+ICsgICAgIHZkdXNlX2Vu cXVldWVfbXNnKCZkZXYtPnNlbmRfbGlzdCwgbXNnKTsKPj4+Pj4+Pj4+PiArICAgICB3YWtlX3Vw KCZkZXYtPndhaXRxKTsKPj4+Pj4+Pj4+PiArICAgICBzcGluX3VubG9jaygmZGV2LT5tc2dfbG9j ayk7Cj4+Pj4+Pj4+Pj4gKyAgICAgd2FpdF9ldmVudF9raWxsYWJsZShtc2ctPndhaXRxLCBtc2ct PmNvbXBsZXRlZCk7Cj4+Pj4+Pj4+PiBXaGF0IGhhcHBlbnMgaWYgdGhlIHVzZXJzcGFjZShtYWxp Y291cykgZG9lc24ndCBnaXZlIGEgcmVzcG9uc2UKPj4+Pj4+Pj4+IGZvcmV2ZXI/Cj4+Pj4+Pj4+ Pgo+Pj4+Pj4+Pj4gSXQgbG9va3MgbGlrZSBhIERPUy4gSWYgeWVzLCB3ZSBuZWVkIHRvIGNvbnNp ZGVyIGEgd2F5IHRvIGZpeCB0aGF0Lgo+Pj4+Pj4+Pj4KPj4+Pj4+Pj4gSG93IGFib3V0IHVzaW5n IHdhaXRfZXZlbnRfa2lsbGFibGVfdGltZW91dCgpIGluc3RlYWQ/Cj4+Pj4+Pj4gUHJvYmFibHks IGFuZCB0aGVuIHdlIG5lZWQgY2hvb3NlIGEgc3VpdGFibGUgdGltZW91dCBhbmQgbW9yZQo+Pj4+ Pj4+IGltcG9ydGFudCwKPj4+Pj4+PiBuZWVkIHRvIHJlcG9ydCB0aGUgZmFpbHVyZSB0byB2aXJ0 aW8uCj4+Pj4+Pj4KPj4+Pj4+IE1ha2VzIHNlbnNlIHRvIG1lLiBCdXQgaXQgbG9va3MgbGlrZSBz b21lCj4+Pj4+PiB2ZHBhX2NvbmZpZ19vcHMvdmlydGlvX2NvbmZpZ19vcHMgc3VjaCBhcyBzZXRf c3RhdHVzKCkgZGlkbid0IGhhdmUgYQo+Pj4+Pj4gcmV0dXJuIHZhbHVlLiAgTm93IEkgYWRkIGEg V0FSTl9PTigpIGZvciB0aGUgZmFpbHVyZS4gRG8geW91IG1lYW4gd2UKPj4+Pj4+IG5lZWQgdG8g YWRkIHNvbWUgY2hhbmdlIGZvciB2aXJ0aW8gY29yZSB0byBoYW5kbGUgdGhlIGZhaWx1cmU/Cj4+ Pj4+IE1heWJlLCBidXQgSSdtIG5vdCBzdXJlIGhvdyBoYXJkIHdlIGNhbiBkbyB0aGF0Lgo+Pj4+ Pgo+Pj4+IFdlIG5lZWQgdG8gY2hhbmdlIGFsbCB2aXJ0aW8gZGV2aWNlIGRyaXZlcnMgaW4gdGhp cyB3YXkuCj4+Pgo+Pj4gUHJvYmFibHkuCj4+Pgo+Pj4KPj4+Pj4gV2UgaGFkIE5FRURTX1JFU0VU IGJ1dCBpdCBsb29rcyB3ZSBkb24ndCBpbXBsZW1lbnQgaXQuCj4+Pj4+Cj4+Pj4gQ291bGQgaXQg aGFuZGxlIHRoZSBmYWlsdXJlIG9mIGdldF9mZWF0dXJlKCkgYW5kIGdldC9zZXRfY29uZmlnKCk/ Cj4+Pgo+Pj4gTG9va3Mgbm90Ogo+Pj4KPj4+ICIKPj4+Cj4+PiBUaGUgZGV2aWNlIFNIT1VMRCBz ZXQgREVWSUNFX05FRURTX1JFU0VUIHdoZW4gaXQgZW50ZXJzIGFuIGVycm9yIHN0YXRlCj4+PiB0 aGF0IGEgcmVzZXQgaXMgbmVlZGVkLiBJZiBEUklWRVJfT0sgaXMgc2V0LCBhZnRlciBpdCBzZXRz Cj4+PiBERVZJQ0VfTkVFRFNfUkVTRVQsIHRoZSBkZXZpY2UgTVVTVCBzZW5kIGEgZGV2aWNlIGNv bmZpZ3VyYXRpb24gY2hhbmdlCj4+PiBub3RpZmljYXRpb24gdG8gdGhlIGRyaXZlci4KPj4+Cj4+ PiAiCj4+Pgo+Pj4gVGhpcyBsb29rcyBpbXBsaWVzIHRoYXQgTkVFRFNfUkVTRVQgbWF5IG9ubHkg d29yayBhZnRlciBkZXZpY2UgaXMKPj4+IHByb2JlZC4gQnV0IGluIHRoZSBjdXJyZW50IGRlc2ln biwgZXZlbiB0aGUgcmVzZXQoKSBpcyBub3QgcmVsaWFibGUuCj4+Pgo+Pj4KPj4+Pj4gT3IgYSBy b3VnaCBpZGVhIGlzIHRoYXQgbWF5YmUgbmVlZCBzb21lIHJlbGF4aW5nIHRvIGJlIGNvdXBsZWQg bG9vc2VseQo+Pj4+PiB3aXRoIHVzZXJzcGFjZS4gRS5nIHRoZSBkZXZpY2UgKGNvbnRyb2wgcGF0 aCkgaXMgaW1wbGVtZW50ZWQgaW4gdGhlCj4+Pj4+IGtlcm5lbCBidXQgdGhlIGRhdGFwYXRoIGlz IGltcGxlbWVudGVkIGluIHRoZSB1c2Vyc3BhY2UgbGlrZSBUVU4vVEFQLgo+Pj4+Pgo+Pj4+IEkg dGhpbmsgaXQgY2FuIHdvcmsgZm9yIG1vc3QgY2FzZXMuIE9uZSBwcm9ibGVtIGlzIHRoYXQgdGhl IHNldF9jb25maWcKPj4+PiBtaWdodCBjaGFuZ2UgdGhlIGJlaGF2aW9yIG9mIHRoZSBkYXRhIHBh dGggYXQgcnVudGltZSwgZS5nLgo+Pj4+IHZpcnRuZXRfc2V0X21hY19hZGRyZXNzKCkgaW4gdGhl IHZpcnRpby1uZXQgZHJpdmVyIGFuZAo+Pj4+IGNhY2hlX3R5cGVfc3RvcmUoKSBpbiB0aGUgdmly dGlvLWJsayBkcml2ZXIuIE5vdCBzdXJlIGlmIHRoaXMgcGF0aCBpcwo+Pj4+IGFibGUgdG8gcmV0 dXJuIGJlZm9yZSB0aGUgZGF0YXBhdGggaXMgYXdhcmUgb2YgdGhpcyBjaGFuZ2UuCj4+Pgo+Pj4g R29vZCBwb2ludC4KPj4+Cj4+PiBCdXQgc2V0X2NvbmZpZygpIHNob3VsZCBiZSByYXJlOgo+Pj4K Pj4+IEUuZyBpbiB0aGUgY2FzZSBvZiB2aXJ0aW8tbmV0IHdpdGggVkVSU0lPTl8xLCBjb25maWcg c3BhY2UgaXMgcmVhZAo+Pj4gb25seSwgYW5kIGl0IHdhcyBzZXQgdmlhIGNvbnRyb2wgdnEuCj4+ Pgo+Pj4gRm9yIGJsb2NrLCB3ZSBjYW4KPj4+Cj4+PiAxKSBzdGFydCBmcm9tIHdpdGhvdXQgV0NF IG9yCj4+PiAyKSB3ZSBhZGQgYSBjb25maWcgY2hhbmdlIG5vdGlmaWNhdGlvbiB0byB1c2Vyc3Bh Y2Ugb3IKPj4+IDMpIGV4dGVuZCB0aGUgc3BlYyB0byB1c2UgdnEgaW5zdGVhZCBvZiBjb25maWcg c3BhY2UKPj4+Cj4+PiBUaGFua3MKPj4KPj4gQW5vdGhlciB0aGluZyBpZiB3ZSB3YW50IHRvIGdv IHRoaXMgd2F5Ogo+Pgo+PiBXZSBuZWVkIGZpbmQgYSB3YXkgdG8gdGVybWluYXRlIHRoZSBkYXRh IHBhdGggZnJvbSB0aGUga2VybmVsIHNpZGUsIHRvCj4+IGltcGxlbWVudCB0byByZXNldCBzZW1h bnRpYy4KPj4KPiBEbyB5b3UgbWVhbiB0ZXJtaW5hdGUgdGhlIGRhdGEgcGF0aCBpbiB2ZHBhX3Jl c2V0KCkuCgoKWWVzLgoKCj4gICBJcyBpdCBvayB0byBqdXN0Cj4gbm90aWZ5IHVzZXJzcGFjZSB0 byBzdG9wIGRhdGEgcGF0aCBhc3luY2hyb25vdXNseT8KCgpGb3Igd2VsbC1iZWhhdmVkIHVzZXJz cGFjZSwgeWVzIGJ1dCBubyBmb3IgYnVnZ3kgb3IgbWFsaWNpb3VzIG9uZXMuCgpJIGhhZCBhbiBp ZGVhLCBob3cgYWJvdXQgdGVybWluYXRlIElPVExCIGluIHRoaXMgY2FzZT8gVGhlbiB3ZSdyZSBp biAKZmFjdCB0dXJuIGRhdGFwYXRoIG9mZi4KClRoYW5rcwoKCj4gICBVc2Vyc3BhY2Ugc2hvdWxk Cj4gbm90IGJlIGFibGUgdG8gZG8gYW55IEkvTyBhdCB0aGF0IHRpbWUgYmVjYXVzZSB0aGUgaW90 bGIgbWFwcGluZyBpcwo+IGFscmVhZHkgcmVtb3ZlZC4KPgo+IFRoYW5rcywKPiBZb25namkKPgoK X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KVmlydHVhbGl6 YXRpb24gbWFpbGluZyBsaXN0ClZpcnR1YWxpemF0aW9uQGxpc3RzLmxpbnV4LWZvdW5kYXRpb24u b3JnCmh0dHBzOi8vbGlzdHMubGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFuL2xpc3RpbmZvL3Zp cnR1YWxpemF0aW9u