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 Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 43FB6C433EF for ; Tue, 8 Feb 2022 08:28:07 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id DCD6240533; Tue, 8 Feb 2022 08:28:06 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2Juc7Gf1XeXK; Tue, 8 Feb 2022 08:28:05 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp2.osuosl.org (Postfix) with ESMTPS id D037240112; Tue, 8 Feb 2022 08:28:04 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id A48BDC001A; Tue, 8 Feb 2022 08:28:04 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [IPv6:2605:bc80:3010::137]) by lists.linuxfoundation.org (Postfix) with ESMTP id BFA3DC000B for ; Tue, 8 Feb 2022 08:28:02 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id AE73B4013E for ; Tue, 8 Feb 2022 08:28:02 +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 FpLfg3t3Vmys for ; Tue, 8 Feb 2022 08:28:01 +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 [170.10.129.124]) by smtp4.osuosl.org (Postfix) with ESMTPS id 647C540131 for ; Tue, 8 Feb 2022 08:28:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1644308880; 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=i1ub9xr/QwA4MhJV+FioBawD7/GrfPqiQxLzRBzhsSs=; b=FSuHaVvd1qPUCBRiavUKebAwEvps/cSSFntxSHLvwa95AdO7Kdr7MUAPDG70StjNpqGWXP Z3DoIxx7k9wiY2XM5fFXQOveBpAkurfri2vDnGkaoxzbxoV84zkJXK/jPlYbH44mYpR0I1 YO1WvgS8tK6rlVXJHMRjdLUe/g7wYDw= Received: from mail-pf1-f199.google.com (mail-pf1-f199.google.com [209.85.210.199]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-295-uVm0cmt2Mt2A0r51t90R8A-1; Tue, 08 Feb 2022 03:27:54 -0500 X-MC-Unique: uVm0cmt2Mt2A0r51t90R8A-1 Received: by mail-pf1-f199.google.com with SMTP id p16-20020aa78610000000b004c7cf2724beso9210915pfn.23 for ; Tue, 08 Feb 2022 00:27:53 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=i1ub9xr/QwA4MhJV+FioBawD7/GrfPqiQxLzRBzhsSs=; b=JDo/Tfii3bm1S/ObTr88qab91KlvBYMNWmNvKAMTSy8UMjohbTBgPHzXAPaQxWOTCv +w3hm5vsLVNHlQerfizBtdNyB/lzAtF/dH5YWOSNA6cEu9P9GNgR0B5Xvq+bMToRZZZE 5yDubsBR4aZaa1nPj3fH/wx+m3fKlZjt9S0QXXKIyuJH7a7BpjKMY368NRDYCXpEXQj2 qxVgJcl87QnzXvo4iYxKJkrXpXlSizcxHGokmZsHB7Ox6SvzVjAfFvPXMHPReXN4kr7d swarunGJCBqtLyLmIuYefwSUwAlsSCF3J8LPGUxmEy8ZqnTOt5OrW40z2nYisLzqke0c GB7w== X-Gm-Message-State: AOAM530emBT+irXQG0Ew9mJAIKTxUTfHQm+V/0HpfQz8can6VXYGndUm OVamzhKT9dbVDwBxmZ/Jm3xBFQheYrjjN14IQj0J32HJ4Fi7SWMEorvRHO79XrnzgTG9Qt6yeFf bbguwjql9/Ye7MjIb9t4xY4seKx3ImxhA8S+QZ1dIVQ== X-Received: by 2002:a17:902:f68a:: with SMTP id l10mr3489629plg.146.1644308872634; Tue, 08 Feb 2022 00:27:52 -0800 (PST) X-Google-Smtp-Source: ABdhPJxpy3xwX9tx9I3wRAwY9kln8W9qHfGjeT7shrOFQnY9sFs9u6bR7EvCTCIWyfnHFjWUf3u30w== X-Received: by 2002:a17:902:f68a:: with SMTP id l10mr3489603plg.146.1644308872240; Tue, 08 Feb 2022 00:27:52 -0800 (PST) Received: from [10.72.13.12] ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id md9sm1840360pjb.6.2022.02.08.00.27.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 08 Feb 2022 00:27:51 -0800 (PST) Message-ID: Date: Tue, 8 Feb 2022 16:27:43 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.5.1 Subject: Re: [PATCH 00/31] vDPA shadow virtqueue To: Eugenio Perez Martin References: <20220121202733.404989-1-eperezma@redhat.com> <7d86c715-6d71-8a27-91f5-8d47b71e3201@redhat.com> From: Jason Wang 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: Laurent Vivier , Parav Pandit , Cindy Lu , "Michael S. Tsirkin" , Richard Henderson , qemu-level , Gautam Dawar , Markus Armbruster , Eduardo Habkost , Harpreet Singh Anand , Xiao W Wang , Stefan Hajnoczi , Eli Cohen , Paolo Bonzini , Zhu Lingshan , virtualization , Eric Blake 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" CuWcqCAyMDIyLzEvMzEg5LiL5Y2INToxNSwgRXVnZW5pbyBQZXJleiBNYXJ0aW4g5YaZ6YGTOgo+ IE9uIEZyaSwgSmFuIDI4LCAyMDIyIGF0IDc6MDIgQU0gSmFzb24gV2FuZyA8amFzb3dhbmdAcmVk aGF0LmNvbT4gd3JvdGU6Cj4+Cj4+IOWcqCAyMDIyLzEvMjIg5LiK5Y2INDoyNywgRXVnZW5pbyBQ w6lyZXog5YaZ6YGTOgo+Pj4gVGhpcyBzZXJpZXMgZW5hYmxlcyBzaGFkb3cgdmlydHF1ZXVlIChT VlEpIGZvciB2aG9zdC12ZHBhIGRldmljZXMuIFRoaXMKPj4+IGlzIGludGVuZGVkIGFzIGEgbmV3 IG1ldGhvZCBvZiB0cmFja2luZyB0aGUgbWVtb3J5IHRoZSBkZXZpY2VzIHRvdWNoCj4+PiBkdXJp bmcgYSBtaWdyYXRpb24gcHJvY2VzczogSW5zdGVhZCBvZiByZWxheSBvbiB2aG9zdCBkZXZpY2Un cyBkaXJ0eQo+Pj4gbG9nZ2luZyBjYXBhYmlsaXR5LCBTVlEgaW50ZXJjZXB0cyB0aGUgVlEgZGF0 YXBsYW5lIGZvcndhcmRpbmcgdGhlCj4+PiBkZXNjcmlwdG9ycyBiZXR3ZWVuIFZNIGFuZCBkZXZp Y2UuIFRoaXMgd2F5IHFlbXUgaXMgdGhlIGVmZmVjdGl2ZQo+Pj4gd3JpdGVyIG9mIGd1ZXN0cyBt ZW1vcnksIGxpa2UgaW4gcWVtdSdzIGVtdWxhdGVkIHZpcnRpbyBkZXZpY2UKPj4+IG9wZXJhdGlv bi4KPj4+Cj4+PiBXaGVuIFNWUSBpcyBlbmFibGVkIHFlbXUgb2ZmZXJzIGEgbmV3IHZpcnR1YWwg YWRkcmVzcyBzcGFjZSB0byB0aGUKPj4+IGRldmljZSB0byByZWFkIGFuZCB3cml0ZSBpbnRvLCBh bmQgaXQgbWFwcyBuZXcgdnJpbmdzIGFuZCB0aGUgZ3Vlc3QKPj4+IG1lbW9yeSBpbiBpdC4gU1ZR IGFsc28gaW50ZXJjZXB0cyBraWNrcyBhbmQgY2FsbHMgYmV0d2VlbiB0aGUgZGV2aWNlCj4+PiBh bmQgdGhlIGd1ZXN0LiBVc2VkIGJ1ZmZlcnMgcmVsYXkgd291bGQgY2F1c2UgZGlydHkgbWVtb3J5 IGJlaW5nCj4+PiB0cmFja2VkLCBidXQgYXQgdGhpcyBSRkMgU1ZRIGlzIG5vdCBlbmFibGVkIG9u IG1pZ3JhdGlvbiBhdXRvbWF0aWNhbGx5Lgo+Pj4KPj4+IFRoYW5rcyBvZiBiZWluZyBhIGJ1ZmZl cnMgcmVsYXkgc3lzdGVtLCBTVlEgY2FuIGJlIHVzZWQgYWxzbyB0bwo+Pj4gY29tbXVuaWNhdGUg ZGV2aWNlcyBhbmQgZHJpdmVycyB3aXRoIGRpZmZlcmVudCBjYXBhYmlsaXRpZXMsIGxpa2UKPj4+ IGRldmljZXMgdGhhdCBvbmx5IHN1cHBvcnQgcGFja2VkIHZyaW5nIGFuZCBub3Qgc3BsaXQgYW5k IG9sZCBndWVzdHMgd2l0aAo+Pj4gbm8gZHJpdmVyIHBhY2tlZCBzdXBwb3J0Lgo+Pj4KPj4+IEl0 IGlzIGJhc2VkIG9uIHRoZSBpZGVhcyBvZiBEUERLIFNXIGFzc2lzdGVkIExNLCBpbiB0aGUgc2Vy aWVzIG9mCj4+PiBEUERLJ3MgaHR0cHM6Ly9wYXRjaHdvcmsuZHBkay5vcmcvY292ZXIvNDgzNzAv IC4gSG93ZXZlciwgdGhlc2UgZG9lcwo+Pj4gbm90IG1hcCB0aGUgc2hhZG93IHZxIGluIGd1ZXN0 J3MgVkEsIGJ1dCBpbiBxZW11J3MuCj4+Pgo+Pj4gVGhpcyB2ZXJzaW9uIG9mIFNWUSBpcyBsaW1p dGVkIGluIHRoZSBhbW91bnQgb2YgZmVhdHVyZXMgaXQgY2FuIHVzZSB3aXRoCj4+PiBndWVzdCBh bmQgZGV2aWNlLCBiZWNhdXNlIHRoaXMgc2VyaWVzIGlzIGFscmVhZHkgdmVyeSBiaWcgb3RoZXJ3 aXNlLgo+Pj4gRmVhdHVyZXMgbGlrZSBpbmRpcmVjdCBvciBldmVudF9pZHggd2lsbCBiZSBhZGRy ZXNzZWQgaW4gZnV0dXJlIHNlcmllcy4KPj4+Cj4+PiBTVlEgbmVlZHMgdG8gYmUgZW5hYmxlZCB3 aXRoIGNtZGxpbmUgcGFyYW1ldGVyIHgtc3ZxLCBsaWtlOgo+Pj4KPj4+IC1uZXRkZXYgdHlwZT12 aG9zdC12ZHBhLHZob3N0ZGV2PS9kZXYvdmhvc3QtdmRwYS0wLGlkPXZob3N0LXZkcGEwLHgtc3Zx PXRydWUKPj4+Cj4+PiBJbiB0aGlzIHZlcnNpb24gaXQgY2Fubm90IGJlIGVuYWJsZWQgb3IgZGlz YWJsZWQgaW4gcnVudGltZS4gRnVydGhlcgo+Pj4gc2VyaWVzIHdpbGwgcmVtb3ZlIHRoaXMgbGlt aXRhdGlvbiBhbmQgd2lsbCBlbmFibGUgaXQgb25seSBmb3IgbWlncmF0aW9uCj4+PiB0aW1lLgo+ Pj4KPj4+IFNvbWUgcGF0Y2hlcyBhcmUgaW50ZW50aW9uYWxseSB2ZXJ5IHNtYWxsIHRvIGVhc2Ug cmV2aWV3LCBidXQgdGhleSBjYW4KPj4+IGJlIHNxdWFzaGVkIGlmIHByZWZlcnJlZC4KPj4+Cj4+ PiBQYXRjaGVzIDEtMTAgcHJlcGFyZXMgdGhlIFNWUSBhbmQgUUVNVSB0byBzdXBwb3J0IGJvdGgg Z3Vlc3QgdG8gZGV2aWNlCj4+PiBhbmQgZGV2aWNlIHRvIGd1ZXN0IG5vdGlmaWNhdGlvbnMgZm9y d2FyZGluZywgd2l0aCB0aGUgZXh0cmEgcWVtdSBob3AuCj4+PiBUaGF0IHBhcnQgY2FuIGJlIHRl c3RlZCBpbiBpc29sYXRpb24gaWYgY21kbGluZSBjaGFuZ2UgaXMgcmVwcm9kdWNlZC4KPj4+Cj4+ PiBQYXRjaGVzIGZyb20gMTEgdG8gMTggaW1wbGVtZW50IHRoZSBhY3R1YWwgYnVmZmVyIGZvcndh cmRpbmcsIGJ1dCB3aXRoCj4+PiBubyBJT01NVSBzdXBwb3J0LiBJdCByZXF1aXJlcyBhIHZkcGEg ZGV2aWNlIGNhcGFibGUgb2YgYWRkcmVzc2luZyBhbGwKPj4+IHFlbXUgdmFkZHIuCj4+Pgo+Pj4g UGF0Y2hlcyAxOSB0byAyMyBhZGRzIHRoZSBpb21tdSBzdXBwb3J0LCBzbyB0aGUgZGV2aWNlIHdp dGggYWRkcmVzcwo+Pj4gcmFuZ2UgbGltaXRhdGlvbnMgY2FuIGFjY2VzcyBTVlEgdGhyb3VnaCB0 aGlzIG5ldyB2aXJ0dWFsIGFkZHJlc3Mgc3BhY2UKPj4+IGNyZWF0ZWQuCj4+Pgo+Pj4gVGhlIHJl c3Qgb2YgdGhlIHNlcmllcyBhZGQgdGhlIGxhc3QgcGllY2VzIG5lZWRlZCBmb3IgbWlncmF0aW9u Lgo+Pj4KPj4+IENvbW1lbnRzIGFyZSB3ZWxjb21lLgo+Pgo+PiBJIHdvbmRlciB0aGUgcGVyZm9y bWFuY2UgaW1wYWN0LiBTbyBwZXJmb3JtYW5jZSBudW1iZXJzIGFyZSBtb3JlIHRoYW4KPj4gd2Vs Y29tZWQuCj4+Cj4gU3VyZSwgSSdsbCBkbyBpdCBmb3IgdGhlIG5leHQgcmV2aXNpb24uIFNpbmNl IHRoaXMgb25lIGJyaW5ncyBhIGRlY2VudAo+IGFtb3VudCBvZiBjaGFuZ2VzLCBJIGNob3NlIHRv IGNvbGxlY3QgdGhlIGZlZWRiYWNrIGZpcnN0LgoKCkEgc2ltcGxlIHNpbmdsZSBUQ1BfU1RSRUFN IG5ldHBlcmYgdGVzdCBzaG91bGQgYmUgc3VmZmljaWVudCB0byBnaXZlIApzb21lIGJhc2ljIHVu ZGVyc3RhbmRpbmcgYWJvdXQgdGhlIHBlcmZvcm1hbmNlIGltcGFjdC4KClRoYW5rcwoKCj4KPiBU aGFua3MhCj4KPj4gVGhhbmtzCj4+Cj4+Cj4+PiBUT0RPOgo+Pj4gKiBFdmVudCwgaW5kaXJlY3Qs IHBhY2tlZCwgYW5kIG90aGVyIGZlYXR1cmVzIG9mIHZpcnRpby4KPj4+ICogVG8gc2VwYXJhdGUg YnVmZmVycyBmb3J3YXJkaW5nIGluIGl0cyBvd24gQUlPIGNvbnRleHQsIHNvIHdlIGNhbgo+Pj4g ICAgIHRocm93IG1vcmUgdGhyZWFkcyB0byB0aGF0IHRhc2sgYW5kIHdlIGRvbid0IG5lZWQgdG8g c3RvcCB0aGUgbWFpbgo+Pj4gICAgIGV2ZW50IGxvb3AuCj4+PiAqIFN1cHBvcnQgdmlydGlvLW5l dCBjb250cm9sIHZxLgo+Pj4gKiBQcm9wZXIgZG9jdW1lbnRhdGlvbi4KPj4+Cj4+PiBDaGFuZ2Vz IGZyb20gdjUgUkZDOgo+Pj4gKiBSZW1vdmUgZHluYW1pYyBlbmFibGVtZW50IG9mIFNWUSwgbWFr aW5nIGxlc3MgZGVwZW5kZW50IG9mIHRoZSBkZXZpY2UuCj4+PiAqIEVuYWJsZSBsaXZlIG1pZ3Jh dGlvbiBpZiBTVlEgaXMgZW5hYmxlZC4KPj4+ICogRml4IFNWUSB3aGVuIGRyaXZlciByZXNldC4K Pj4+ICogQ29tbWVudHMgYWRkcmVzc2VkLCBzcGVjaWFsbHkgaW4gdGhlIGlvdmEgYXJlYS4KPj4+ ICogUmViYXNlIG9uIGxhdGVzdCBtYXN0ZXIsIGFkZGluZyBtdWx0aXF1ZXVlIHN1cHBvcnQgKGJ1 dCBubyBuZXR3b3JraW5nCj4+PiAgICAgY29udHJvbCB2cSBwcm9jZXNzaW5nKS4KPj4+IHY1IGxp bms6Cj4+PiBodHRwczovL2xpc3RzLmdudS5vcmcvYXJjaGl2ZS9odG1sL3FlbXUtZGV2ZWwvMjAy MS0xMC9tc2cwNzI1MC5odG1sCj4+Pgo+Pj4gQ2hhbmdlcyBmcm9tIHY0IFJGQzoKPj4+ICogU3Vw cG9ydCBvZiBhbGxvY2F0aW5nIC8gZnJlZWluZyBpb3ZhIHJhbmdlcyBpbiBJT1ZBIHRyZWUuIEV4 dGVuZGluZwo+Pj4gICAgIGFscmVhZHkgcHJlc2VudCBpb3ZhLXRyZWUgZm9yIHRoYXQuCj4+PiAq IFByb3BlciB2YWxpZGF0aW9uIG9mIGd1ZXN0IGZlYXR1cmVzLiBOb3cgU1ZRIGNhbiBuZWdvdGlh dGUgYQo+Pj4gICAgIGRpZmZlcmVudCBzZXQgb2YgZmVhdHVyZXMgd2l0aCB0aGUgZGV2aWNlIHdo ZW4gZW5hYmxlZC4KPj4+ICogU3VwcG9ydCBvZiBob3N0IG5vdGlmaWVycyBtZW1vcnkgcmVnaW9u cwo+Pj4gKiBIYW5kbGluZyBvZiBTVlEgZnVsbCBxdWV1ZSBpbiBjYXNlIGd1ZXN0J3MgZGVzY3Jp cHRvcnMgc3BhbiB0bwo+Pj4gICAgIGRpZmZlcmVudCBtZW1vcnkgcmVnaW9ucyAocWVtdSdzIFZB IGNodW5rcykuCj4+PiAqIEZsdXNoIHBlbmRpbmcgdXNlZCBidWZmZXJzIGF0IGVuZCBvZiBTVlEg b3BlcmF0aW9uLgo+Pj4gKiBRTVAgY29tbWFuZCBub3cgbG9va3MgYnkgTmV0Q2xpZW50U3RhdGUg bmFtZS4gT3RoZXIgZGV2aWNlcyB3aWxsIG5lZWQKPj4+ICAgICB0byBpbXBsZW1lbnQgaXQncyB3 YXkgdG8gZW5hYmxlIHZkcGEuCj4+PiAqIFJlbmFtZSBRTVAgY29tbWFuZCB0byBzZXQsIHNvIGl0 IGxvb2tzIG1vcmUgbGlrZSBhIHdheSBvZiB3b3JraW5nCj4+PiAqIEJldHRlciB1c2Ugb2YgcWVt dSBlcnJvciBzeXN0ZW0KPj4+ICogTWFrZSBhIGZldyBhc3NlcnRpb25zIHByb3BlciBlcnJvci1o YW5kbGluZyBwYXRocy4KPj4+ICogQWRkIG1vcmUgZG9jdW1lbnRhdGlvbgo+Pj4gKiBMZXNzIGNv dXBsaW5nIG9mIHZpcnRpbyAvIHZob3N0LCB0aGF0IGNvdWxkIGNhdXNlIGZyaWN0aW9uIG9uIGNo YW5nZXMKPj4+ICogQWRkcmVzc2VkIG1hbnkgb3RoZXIgc21hbGwgY29tbWVudHMgYW5kIHNtYWxs IGZpeGVzLgo+Pj4KPj4+IENoYW5nZXMgZnJvbSB2MyBSRkM6Cj4+PiAgICAgKiBNb3ZlIGV2ZXJ5 dGhpbmcgdG8gdmhvc3QtdmRwYSBiYWNrZW5kLiBBIGJpZyBjaGFuZ2UsIHRoaXMgYWxsb3dlZAo+ Pj4gICAgICAgc29tZSBjbGVhbnVwIGJ1dCBtb3JlIGNvZGUgaGFzIGJlZW4gYWRkZWQgaW4gb3Ro ZXIgcGxhY2VzLgo+Pj4gICAgICogTW9yZSB1c2Ugb2YgZ2xpYiB1dGlsaXRpZXMsIGVzcGVjaWFs bHkgdG8gbWFuYWdlIG1lbW9yeS4KPj4+IHYzIGxpbms6Cj4+PiBodHRwczovL2xpc3RzLm5vbmdu dS5vcmcvYXJjaGl2ZS9odG1sL3FlbXUtZGV2ZWwvMjAyMS0wNS9tc2cwNjAzMi5odG1sCj4+Pgo+ Pj4gQ2hhbmdlcyBmcm9tIHYyIFJGQzoKPj4+ICAgICAqIEFkZGluZyB2aG9zdC12ZHBhIGRldmlj ZXMgc3VwcG9ydAo+Pj4gICAgICogRml4ZWQgc29tZSBtZW1vcnkgbGVha3MgcG9pbnRlZCBieSBk aWZmZXJlbnQgY29tbWVudHMKPj4+IHYyIGxpbms6Cj4+PiBodHRwczovL2xpc3RzLm5vbmdudS5v cmcvYXJjaGl2ZS9odG1sL3FlbXUtZGV2ZWwvMjAyMS0wMy9tc2cwNTYwMC5odG1sCj4+Pgo+Pj4g Q2hhbmdlcyBmcm9tIHYxIFJGQzoKPj4+ICAgICAqIFVzZSBRTVAgaW5zdGVhZCBvZiBtaWdyYXRp b24gdG8gc3RhcnQgU1ZRIG1vZGUuCj4+PiAgICAgKiBPbmx5IGFjY2VwdGluZyBJT01NVSBkZXZp Y2VzLCBjbG9zZXIgYmVoYXZpb3Igd2l0aCB0YXJnZXQgZGV2aWNlcwo+Pj4gICAgICAgKHZEUEEp Cj4+PiAgICAgKiBGaXggaW52YWxpZCBtYXNraW5nL3VubWFza2luZyBvZiB2aG9zdCBjYWxsIGZk Lgo+Pj4gICAgICogVXNlIG9mIHByb3BlciBtZXRob2RzIGZvciBzeW5jaHJvbml6YXRpb24uCj4+ PiAgICAgKiBObyBuZWVkIHRvIG1vZGlmeSBWaXJ0SU8gZGV2aWNlIGNvZGUsIGFsbCBvZiB0aGUg Y2hhbmdlcyBhcmUKPj4+ICAgICAgIGNvbnRhaW5lZCBpbiB2aG9zdCBjb2RlLgo+Pj4gICAgICog RGVsZXRlIHN1cGVyZmx1b3VzIGNvZGUuCj4+PiAgICAgKiBBbiBpbnRlcm1lZGlhdGUgUkZDIHdh cyBzZW50IHdpdGggb25seSB0aGUgbm90aWZpY2F0aW9ucyBmb3J3YXJkaW5nCj4+PiAgICAgICBj aGFuZ2VzLiBJdCBjYW4gYmUgc2VlbiBpbgo+Pj4gICAgICAgaHR0cHM6Ly9wYXRjaGV3Lm9yZy9R RU1VLzIwMjEwMTI5MjA1NDE1Ljg3NjI5MC0xLWVwZXJlem1hQHJlZGhhdC5jb20vCj4+PiB2MSBs aW5rOgo+Pj4gaHR0cHM6Ly9saXN0cy5nbnUub3JnL2FyY2hpdmUvaHRtbC9xZW11LWRldmVsLzIw MjAtMTEvbXNnMDUzNzIuaHRtbAo+Pj4KPj4+IEV1Z2VuaW8gUMOpcmV6ICgyMCk6Cj4+PiAgICAg ICAgIHZpcnRpbzogQWRkIFZJUlRJT19GX1FVRVVFX1NUQVRFCj4+PiAgICAgICAgIHZpcnRpby1u ZXQ6IEhvbm9yIFZJUlRJT19DT05GSUdfU19ERVZJQ0VfU1RPUFBFRAo+Pj4gICAgICAgICB2aXJ0 aW86IEFkZCB2aXJ0aW9fcXVldWVfaXNfaG9zdF9ub3RpZmllcl9lbmFibGVkCj4+PiAgICAgICAg IHZob3N0OiBNYWtlIHZob3N0X3ZpcnRxdWV1ZV97c3RhcnQsc3RvcH0gcHVibGljCj4+PiAgICAg ICAgIHZob3N0OiBBZGQgeC12aG9zdC1lbmFibGUtc2hhZG93LXZxIHFtcAo+Pj4gICAgICAgICB2 aG9zdDogQWRkIFZob3N0U2hhZG93VmlydHF1ZXVlCj4+PiAgICAgICAgIHZkcGE6IFJlZ2lzdGVy IHZkcGEgZGV2aWNlcyBpbiBhIGxpc3QKPj4+ICAgICAgICAgdmhvc3Q6IFJvdXRlIGd1ZXN0LT5o b3N0IG5vdGlmaWNhdGlvbiB0aHJvdWdoIHNoYWRvdyB2aXJ0cXVldWUKPj4+ICAgICAgICAgQWRk IHZob3N0X3N2cV9nZXRfc3ZxX2NhbGxfbm90aWZpZXIKPj4+ICAgICAgICAgQWRkIHZob3N0X3N2 cV9zZXRfZ3Vlc3RfY2FsbF9ub3RpZmllcgo+Pj4gICAgICAgICB2ZHBhOiBTYXZlIGNhbGxfZmQg aW4gdmhvc3QtdmRwYQo+Pj4gICAgICAgICB2aG9zdC12ZHBhOiBUYWtlIGludG8gYWNjb3VudCBT VlEgaW4gdmhvc3RfdmRwYV9zZXRfdnJpbmdfY2FsbAo+Pj4gICAgICAgICB2aG9zdDogUm91dGUg aG9zdC0+Z3Vlc3Qgbm90aWZpY2F0aW9uIHRocm91Z2ggc2hhZG93IHZpcnRxdWV1ZQo+Pj4gICAg ICAgICB2aXJ0aW86IEFkZCB2aG9zdF9zaGFkb3dfdnFfZ2V0X3ZyaW5nX2FkZHIKPj4+ICAgICAg ICAgdmRwYTogU2F2ZSBob3N0IGFuZCBndWVzdCBmZWF0dXJlcwo+Pj4gICAgICAgICB2aG9zdDog QWRkIHZob3N0X3N2cV92YWxpZF9kZXZpY2VfZmVhdHVyZXMgdG8gc2hhZG93IHZxCj4+PiAgICAg ICAgIHZob3N0OiBTaGFkb3cgdmlydHF1ZXVlIGJ1ZmZlcnMgZm9yd2FyZGluZwo+Pj4gICAgICAg ICB2aG9zdDogQWRkIFZob3N0SU9WQVRyZWUKPj4+ICAgICAgICAgdmhvc3Q6IFVzZSBhIHRyZWUg dG8gc3RvcmUgbWVtb3J5IG1hcHBpbmdzCj4+PiAgICAgICAgIHZkcGE6IEFkZCBjdXN0b20gSU9U TEIgdHJhbnNsYXRpb25zIHRvIFNWUQo+Pj4KPj4+IEV1Z2VuaW8gUMOpcmV6ICgzMSk6Cj4+PiAg ICAgdmRwYTogUmVvcmRlciB2aXJ0aW8vdmhvc3QtdmRwYS5jIGZ1bmN0aW9ucwo+Pj4gICAgIHZo b3N0OiBBZGQgVmhvc3RTaGFkb3dWaXJ0cXVldWUKPj4+ICAgICB2ZHBhOiBBZGQgdmhvc3Rfc3Zx X2dldF9kZXZfa2lja19ub3RpZmllcgo+Pj4gICAgIHZkcGE6IEFkZCB2aG9zdF9zdnFfc2V0X3N2 cV9raWNrX2ZkCj4+PiAgICAgdmhvc3Q6IEFkZCBTaGFkb3cgVmlydFF1ZXVlIGtpY2sgZm9yd2Fy ZGluZyBjYXBhYmlsaXRpZXMKPj4+ICAgICB2aG9zdDogUm91dGUgZ3Vlc3QtPmhvc3Qgbm90aWZp Y2F0aW9uIHRocm91Z2ggc2hhZG93IHZpcnRxdWV1ZQo+Pj4gICAgIHZob3N0OiBkZCB2aG9zdF9z dnFfZ2V0X3N2cV9jYWxsX25vdGlmaWVyCj4+PiAgICAgdmhvc3Q6IEFkZCB2aG9zdF9zdnFfc2V0 X2d1ZXN0X2NhbGxfbm90aWZpZXIKPj4+ICAgICB2aG9zdC12ZHBhOiBUYWtlIGludG8gYWNjb3Vu dCBTVlEgaW4gdmhvc3RfdmRwYV9zZXRfdnJpbmdfY2FsbAo+Pj4gICAgIHZob3N0OiBSb3V0ZSBo b3N0LT5ndWVzdCBub3RpZmljYXRpb24gdGhyb3VnaCBzaGFkb3cgdmlydHF1ZXVlCj4+PiAgICAg dmhvc3Q6IEFkZCB2aG9zdF9zdnFfdmFsaWRfZGV2aWNlX2ZlYXR1cmVzIHRvIHNoYWRvdyB2cQo+ Pj4gICAgIHZob3N0OiBBZGQgdmhvc3Rfc3ZxX3ZhbGlkX2d1ZXN0X2ZlYXR1cmVzIHRvIHNoYWRv dyB2cQo+Pj4gICAgIHZob3N0OiBBZGQgdmhvc3Rfc3ZxX2Fja19ndWVzdF9mZWF0dXJlcyB0byBz aGFkb3cgdnEKPj4+ICAgICB2aXJ0aW86IEFkZCB2aG9zdF9zaGFkb3dfdnFfZ2V0X3ZyaW5nX2Fk ZHIKPj4+ICAgICB2ZHBhOiBBZGQgdmhvc3Rfc3ZxX2dldF9udW0KPj4+ICAgICB2aG9zdDogcGFz cyBxdWV1ZSBpbmRleCB0byB2aG9zdF92cV9nZXRfYWRkcgo+Pj4gICAgIHZkcGE6IGFkYXB0IHZo b3N0X29wcyBjYWxsYmFja3MgdG8gc3ZxCj4+PiAgICAgdmhvc3Q6IFNoYWRvdyB2aXJ0cXVldWUg YnVmZmVycyBmb3J3YXJkaW5nCj4+PiAgICAgdXRpbHM6IEFkZCBpbnRlcm5hbCBETUFNYXAgdG8g aW92YS10cmVlCj4+PiAgICAgdXRpbDogU3RvcmUgRE1BIGVudHJpZXMgaW4gYSBsaXN0Cj4+PiAg ICAgdXRpbDogQWRkIGlvdmFfdHJlZV9hbGxvYwo+Pj4gICAgIHZob3N0OiBBZGQgVmhvc3RJT1ZB VHJlZQo+Pj4gICAgIHZkcGE6IEFkZCBjdXN0b20gSU9UTEIgdHJhbnNsYXRpb25zIHRvIFNWUQo+ Pj4gICAgIHZob3N0OiBBZGQgdmhvc3Rfc3ZxX2dldF9sYXN0X3VzZWRfaWR4Cj4+PiAgICAgdmRw YTogQWRhcHQgdmhvc3RfdmRwYV9nZXRfdnJpbmdfYmFzZSB0byBTVlEKPj4+ICAgICB2ZHBhOiBD bGVhciBWSE9TVF9WUklOR19GX0xPRyBhdCB2aG9zdF92ZHBhX3NldF92cmluZ19hZGRyIGluIFNW UQo+Pj4gICAgIHZkcGE6IE5ldmVyIHNldCBsb2dfYmFzZSBhZGRyIGlmIFNWUSBpcyBlbmFibGVk Cj4+PiAgICAgdmRwYTogRXhwb3NlIFZIT1NUX0ZfTE9HX0FMTCBvbiBTVlEKPj4+ICAgICB2ZHBh OiBNYWtlIG5jcyBhdXRvZnJlZQo+Pj4gICAgIHZkcGE6IE1vdmUgdmhvc3RfdmRwYV9nZXRfaW92 YV9yYW5nZSB0byBuZXQvdmhvc3QtdmRwYS5jCj4+PiAgICAgdmRwYTogQWRkIHgtc3ZxIHRvIE5l dGRldlZob3N0VkRQQU9wdGlvbnMKPj4+Cj4+PiAgICBxYXBpL25ldC5qc29uICAgICAgICAgICAg ICAgICAgICAgIHwgICA1ICstCj4+PiAgICBody92aXJ0aW8vdmhvc3QtaW92YS10cmVlLmggICAg ICAgIHwgIDI3ICsKPj4+ICAgIGh3L3ZpcnRpby92aG9zdC1zaGFkb3ctdmlydHF1ZXVlLmggfCAg NDYgKysKPj4+ICAgIGluY2x1ZGUvaHcvdmlydGlvL3Zob3N0LXZkcGEuaCAgICAgfCAgIDcgKwo+ Pj4gICAgaW5jbHVkZS9xZW11L2lvdmEtdHJlZS5oICAgICAgICAgICB8ICAxNyArCj4+PiAgICBo dy92aXJ0aW8vdmhvc3QtaW92YS10cmVlLmMgICAgICAgIHwgMTU3ICsrKysrKwo+Pj4gICAgaHcv dmlydGlvL3Zob3N0LXNoYWRvdy12aXJ0cXVldWUuYyB8IDc2MSArKysrKysrKysrKysrKysrKysr KysrKysrKysrKwo+Pj4gICAgaHcvdmlydGlvL3Zob3N0LXZkcGEuYyAgICAgICAgICAgICB8IDc0 MCArKysrKysrKysrKysrKysrKysrKysrKystLS0tCj4+PiAgICBody92aXJ0aW8vdmhvc3QuYyAg ICAgICAgICAgICAgICAgIHwgICA2ICstCj4+PiAgICBuZXQvdmhvc3QtdmRwYS5jICAgICAgICAg ICAgICAgICAgIHwgIDU4ICsrLQo+Pj4gICAgdXRpbC9pb3ZhLXRyZWUuYyAgICAgICAgICAgICAg ICAgICB8IDE2MSArKysrKy0KPj4+ICAgIGh3L3ZpcnRpby9tZXNvbi5idWlsZCAgICAgICAgICAg ICAgfCAgIDIgKy0KPj4+ICAgIDEyIGZpbGVzIGNoYW5nZWQsIDE4NTIgaW5zZXJ0aW9ucygrKSwg MTM1IGRlbGV0aW9ucygtKQo+Pj4gICAgY3JlYXRlIG1vZGUgMTAwNjQ0IGh3L3ZpcnRpby92aG9z dC1pb3ZhLXRyZWUuaAo+Pj4gICAgY3JlYXRlIG1vZGUgMTAwNjQ0IGh3L3ZpcnRpby92aG9zdC1z aGFkb3ctdmlydHF1ZXVlLmgKPj4+ICAgIGNyZWF0ZSBtb2RlIDEwMDY0NCBody92aXJ0aW8vdmhv c3QtaW92YS10cmVlLmMKPj4+ICAgIGNyZWF0ZSBtb2RlIDEwMDY0NCBody92aXJ0aW8vdmhvc3Qt c2hhZG93LXZpcnRxdWV1ZS5jCj4+PgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX18KVmlydHVhbGl6YXRpb24gbWFpbGluZyBsaXN0ClZpcnR1YWxpemF0aW9u QGxpc3RzLmxpbnV4LWZvdW5kYXRpb24ub3JnCmh0dHBzOi8vbGlzdHMubGludXhmb3VuZGF0aW9u Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3ZpcnR1YWxpemF0aW9u 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 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 29870C433F5 for ; Tue, 8 Feb 2022 09:09:41 +0000 (UTC) Received: from localhost ([::1]:47148 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nHMVH-00055m-3o for qemu-devel@archiver.kernel.org; Tue, 08 Feb 2022 04:09:39 -0500 Received: from eggs.gnu.org ([209.51.188.92]:37870) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nHLqz-0002Dt-V4 for qemu-devel@nongnu.org; Tue, 08 Feb 2022 03:28:02 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:29537) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nHLqw-0002yB-Rg for qemu-devel@nongnu.org; Tue, 08 Feb 2022 03:28:01 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1644308878; 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=i1ub9xr/QwA4MhJV+FioBawD7/GrfPqiQxLzRBzhsSs=; b=CJJUmgY7vek4jvzqB2haBYcJbugc65c4JRXFTILmtzZPIIufzsDCLMly154FbuBSCz1U0U WGX+bqrST78dXbuYAODMf80okTPQH2taVQBQk3Z9A4AzlusbXUoi5vG4h3LjPsu/yBWAg4 pLdUGaMa9QsNbntoF2WzyGeYv/fBfn8= Received: from mail-pf1-f199.google.com (mail-pf1-f199.google.com [209.85.210.199]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-478-JfhL699OPiGmI7cWL7IriQ-1; Tue, 08 Feb 2022 03:27:54 -0500 X-MC-Unique: JfhL699OPiGmI7cWL7IriQ-1 Received: by mail-pf1-f199.google.com with SMTP id b11-20020aa7950b000000b004df185959c4so6987876pfp.8 for ; Tue, 08 Feb 2022 00:27:53 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=i1ub9xr/QwA4MhJV+FioBawD7/GrfPqiQxLzRBzhsSs=; b=L+rBjKCO1e/jdLWt9FDMtH899U1sCg8ljp38GPP1Yq+x7OXwxOKLDZqRvh/7usP6T0 w/tzcfGeTvWnsmgUis/PcmMl7yrsxXA07gkVn3/ujGDTCnc9tqdow1nty8+Y+snt7beW KdkmMUA7pCA24DdKB8j57AGKNhrJ4g2l/xuslkJViroXL02MGMR+8DsmWXYVokeoIJHc ZLZIfkJ6ECj0SfPWoAmE77m1IDP66xETHi34xZVUrDjqyQ7RiXy0TqM8XK4EkJZrYvTw FHlJbyLPNGNTntxFILZrf9OG89uDcAePtSPdJdLsI+XXAlorYx5K0MvlAxu8Iy4xGk2l HKgw== X-Gm-Message-State: AOAM530UZHeNoFfesCEoX93aynXFEWMNDd9ZGjiKmx7mCsPo1SszPsEm FHJWvulLj0v06IVJM5WQoQfzKnK/q5JDdIPEpRgf4LbV45XLXPuDKjohLZ9i/5dbgDfslylUdIA 7R8astpSA2DgJ6kw= X-Received: by 2002:a17:902:f68a:: with SMTP id l10mr3489645plg.146.1644308872669; Tue, 08 Feb 2022 00:27:52 -0800 (PST) X-Google-Smtp-Source: ABdhPJxpy3xwX9tx9I3wRAwY9kln8W9qHfGjeT7shrOFQnY9sFs9u6bR7EvCTCIWyfnHFjWUf3u30w== X-Received: by 2002:a17:902:f68a:: with SMTP id l10mr3489603plg.146.1644308872240; Tue, 08 Feb 2022 00:27:52 -0800 (PST) Received: from [10.72.13.12] ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id md9sm1840360pjb.6.2022.02.08.00.27.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 08 Feb 2022 00:27:51 -0800 (PST) Message-ID: Date: Tue, 8 Feb 2022 16:27:43 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.5.1 Subject: Re: [PATCH 00/31] vDPA shadow virtqueue To: Eugenio Perez Martin References: <20220121202733.404989-1-eperezma@redhat.com> <7d86c715-6d71-8a27-91f5-8d47b71e3201@redhat.com> From: Jason Wang 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 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Parav Pandit , Cindy Lu , "Michael S. Tsirkin" , Juan Quintela , Richard Henderson , qemu-level , Gautam Dawar , Markus Armbruster , Eduardo Habkost , Harpreet Singh Anand , Xiao W Wang , Peter Xu , Stefan Hajnoczi , Eli Cohen , Paolo Bonzini , Zhu Lingshan , virtualization , Eric Blake , Stefano Garzarella Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 在 2022/1/31 下午5:15, Eugenio Perez Martin 写道: > On Fri, Jan 28, 2022 at 7:02 AM Jason Wang wrote: >> >> 在 2022/1/22 上午4:27, Eugenio Pérez 写道: >>> This series enables shadow virtqueue (SVQ) for vhost-vdpa devices. This >>> is intended as a new method of tracking the memory the devices touch >>> during a migration process: Instead of relay on vhost device's dirty >>> logging capability, SVQ intercepts the VQ dataplane forwarding the >>> descriptors between VM and device. This way qemu is the effective >>> writer of guests memory, like in qemu's emulated virtio device >>> operation. >>> >>> When SVQ is enabled qemu offers a new virtual address space to the >>> device to read and write into, and it maps new vrings and the guest >>> memory in it. SVQ also intercepts kicks and calls between the device >>> and the guest. Used buffers relay would cause dirty memory being >>> tracked, but at this RFC SVQ is not enabled on migration automatically. >>> >>> Thanks of being a buffers relay system, SVQ can be used also to >>> communicate devices and drivers with different capabilities, like >>> devices that only support packed vring and not split and old guests with >>> no driver packed support. >>> >>> It is based on the ideas of DPDK SW assisted LM, in the series of >>> DPDK's https://patchwork.dpdk.org/cover/48370/ . However, these does >>> not map the shadow vq in guest's VA, but in qemu's. >>> >>> This version of SVQ is limited in the amount of features it can use with >>> guest and device, because this series is already very big otherwise. >>> Features like indirect or event_idx will be addressed in future series. >>> >>> SVQ needs to be enabled with cmdline parameter x-svq, like: >>> >>> -netdev type=vhost-vdpa,vhostdev=/dev/vhost-vdpa-0,id=vhost-vdpa0,x-svq=true >>> >>> In this version it cannot be enabled or disabled in runtime. Further >>> series will remove this limitation and will enable it only for migration >>> time. >>> >>> Some patches are intentionally very small to ease review, but they can >>> be squashed if preferred. >>> >>> Patches 1-10 prepares the SVQ and QEMU to support both guest to device >>> and device to guest notifications forwarding, with the extra qemu hop. >>> That part can be tested in isolation if cmdline change is reproduced. >>> >>> Patches from 11 to 18 implement the actual buffer forwarding, but with >>> no IOMMU support. It requires a vdpa device capable of addressing all >>> qemu vaddr. >>> >>> Patches 19 to 23 adds the iommu support, so the device with address >>> range limitations can access SVQ through this new virtual address space >>> created. >>> >>> The rest of the series add the last pieces needed for migration. >>> >>> Comments are welcome. >> >> I wonder the performance impact. So performance numbers are more than >> welcomed. >> > Sure, I'll do it for the next revision. Since this one brings a decent > amount of changes, I chose to collect the feedback first. A simple single TCP_STREAM netperf test should be sufficient to give some basic understanding about the performance impact. Thanks > > Thanks! > >> Thanks >> >> >>> TODO: >>> * Event, indirect, packed, and other features of virtio. >>> * To separate buffers forwarding in its own AIO context, so we can >>> throw more threads to that task and we don't need to stop the main >>> event loop. >>> * Support virtio-net control vq. >>> * Proper documentation. >>> >>> Changes from v5 RFC: >>> * Remove dynamic enablement of SVQ, making less dependent of the device. >>> * Enable live migration if SVQ is enabled. >>> * Fix SVQ when driver reset. >>> * Comments addressed, specially in the iova area. >>> * Rebase on latest master, adding multiqueue support (but no networking >>> control vq processing). >>> v5 link: >>> https://lists.gnu.org/archive/html/qemu-devel/2021-10/msg07250.html >>> >>> Changes from v4 RFC: >>> * Support of allocating / freeing iova ranges in IOVA tree. Extending >>> already present iova-tree for that. >>> * Proper validation of guest features. Now SVQ can negotiate a >>> different set of features with the device when enabled. >>> * Support of host notifiers memory regions >>> * Handling of SVQ full queue in case guest's descriptors span to >>> different memory regions (qemu's VA chunks). >>> * Flush pending used buffers at end of SVQ operation. >>> * QMP command now looks by NetClientState name. Other devices will need >>> to implement it's way to enable vdpa. >>> * Rename QMP command to set, so it looks more like a way of working >>> * Better use of qemu error system >>> * Make a few assertions proper error-handling paths. >>> * Add more documentation >>> * Less coupling of virtio / vhost, that could cause friction on changes >>> * Addressed many other small comments and small fixes. >>> >>> Changes from v3 RFC: >>> * Move everything to vhost-vdpa backend. A big change, this allowed >>> some cleanup but more code has been added in other places. >>> * More use of glib utilities, especially to manage memory. >>> v3 link: >>> https://lists.nongnu.org/archive/html/qemu-devel/2021-05/msg06032.html >>> >>> Changes from v2 RFC: >>> * Adding vhost-vdpa devices support >>> * Fixed some memory leaks pointed by different comments >>> v2 link: >>> https://lists.nongnu.org/archive/html/qemu-devel/2021-03/msg05600.html >>> >>> Changes from v1 RFC: >>> * Use QMP instead of migration to start SVQ mode. >>> * Only accepting IOMMU devices, closer behavior with target devices >>> (vDPA) >>> * Fix invalid masking/unmasking of vhost call fd. >>> * Use of proper methods for synchronization. >>> * No need to modify VirtIO device code, all of the changes are >>> contained in vhost code. >>> * Delete superfluous code. >>> * An intermediate RFC was sent with only the notifications forwarding >>> changes. It can be seen in >>> https://patchew.org/QEMU/20210129205415.876290-1-eperezma@redhat.com/ >>> v1 link: >>> https://lists.gnu.org/archive/html/qemu-devel/2020-11/msg05372.html >>> >>> Eugenio Pérez (20): >>> virtio: Add VIRTIO_F_QUEUE_STATE >>> virtio-net: Honor VIRTIO_CONFIG_S_DEVICE_STOPPED >>> virtio: Add virtio_queue_is_host_notifier_enabled >>> vhost: Make vhost_virtqueue_{start,stop} public >>> vhost: Add x-vhost-enable-shadow-vq qmp >>> vhost: Add VhostShadowVirtqueue >>> vdpa: Register vdpa devices in a list >>> vhost: Route guest->host notification through shadow virtqueue >>> Add vhost_svq_get_svq_call_notifier >>> Add vhost_svq_set_guest_call_notifier >>> vdpa: Save call_fd in vhost-vdpa >>> vhost-vdpa: Take into account SVQ in vhost_vdpa_set_vring_call >>> vhost: Route host->guest notification through shadow virtqueue >>> virtio: Add vhost_shadow_vq_get_vring_addr >>> vdpa: Save host and guest features >>> vhost: Add vhost_svq_valid_device_features to shadow vq >>> vhost: Shadow virtqueue buffers forwarding >>> vhost: Add VhostIOVATree >>> vhost: Use a tree to store memory mappings >>> vdpa: Add custom IOTLB translations to SVQ >>> >>> Eugenio Pérez (31): >>> vdpa: Reorder virtio/vhost-vdpa.c functions >>> vhost: Add VhostShadowVirtqueue >>> vdpa: Add vhost_svq_get_dev_kick_notifier >>> vdpa: Add vhost_svq_set_svq_kick_fd >>> vhost: Add Shadow VirtQueue kick forwarding capabilities >>> vhost: Route guest->host notification through shadow virtqueue >>> vhost: dd vhost_svq_get_svq_call_notifier >>> vhost: Add vhost_svq_set_guest_call_notifier >>> vhost-vdpa: Take into account SVQ in vhost_vdpa_set_vring_call >>> vhost: Route host->guest notification through shadow virtqueue >>> vhost: Add vhost_svq_valid_device_features to shadow vq >>> vhost: Add vhost_svq_valid_guest_features to shadow vq >>> vhost: Add vhost_svq_ack_guest_features to shadow vq >>> virtio: Add vhost_shadow_vq_get_vring_addr >>> vdpa: Add vhost_svq_get_num >>> vhost: pass queue index to vhost_vq_get_addr >>> vdpa: adapt vhost_ops callbacks to svq >>> vhost: Shadow virtqueue buffers forwarding >>> utils: Add internal DMAMap to iova-tree >>> util: Store DMA entries in a list >>> util: Add iova_tree_alloc >>> vhost: Add VhostIOVATree >>> vdpa: Add custom IOTLB translations to SVQ >>> vhost: Add vhost_svq_get_last_used_idx >>> vdpa: Adapt vhost_vdpa_get_vring_base to SVQ >>> vdpa: Clear VHOST_VRING_F_LOG at vhost_vdpa_set_vring_addr in SVQ >>> vdpa: Never set log_base addr if SVQ is enabled >>> vdpa: Expose VHOST_F_LOG_ALL on SVQ >>> vdpa: Make ncs autofree >>> vdpa: Move vhost_vdpa_get_iova_range to net/vhost-vdpa.c >>> vdpa: Add x-svq to NetdevVhostVDPAOptions >>> >>> qapi/net.json | 5 +- >>> hw/virtio/vhost-iova-tree.h | 27 + >>> hw/virtio/vhost-shadow-virtqueue.h | 46 ++ >>> include/hw/virtio/vhost-vdpa.h | 7 + >>> include/qemu/iova-tree.h | 17 + >>> hw/virtio/vhost-iova-tree.c | 157 ++++++ >>> hw/virtio/vhost-shadow-virtqueue.c | 761 +++++++++++++++++++++++++++++ >>> hw/virtio/vhost-vdpa.c | 740 ++++++++++++++++++++++++---- >>> hw/virtio/vhost.c | 6 +- >>> net/vhost-vdpa.c | 58 ++- >>> util/iova-tree.c | 161 +++++- >>> hw/virtio/meson.build | 2 +- >>> 12 files changed, 1852 insertions(+), 135 deletions(-) >>> create mode 100644 hw/virtio/vhost-iova-tree.h >>> create mode 100644 hw/virtio/vhost-shadow-virtqueue.h >>> create mode 100644 hw/virtio/vhost-iova-tree.c >>> create mode 100644 hw/virtio/vhost-shadow-virtqueue.c >>>