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Tsirkin" To: Jason Wang Subject: Re: [PATCH 0/2] vdpa: Add logging operatins Message-ID: <20231018110719-mutt-send-email-mst@kernel.org> References: MIME-Version: 1.0 In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Cc: eric.fangyi@huawei.com, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Jiang Dongxu , eperezma , longpeng2@huawei.com, Siwei Liu 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-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" T24gTW9uLCBTZXAgMTEsIDIwMjMgYXQgMDI6NTY6NThQTSArMDgwMCwgSmFzb24gV2FuZyB3cm90 ZToKPiBBZGRpbmcgRXVnZW5pbyBhbmQgU2kgV2VpLgo+IAo+IE9uIFNhdCwgQXVnIDI2LCAyMDIz IGF0IDk6MjTigK9BTSBKaWFuZyBEb25neHUgPGppYW5nZG9uZ3h1MUBodWF3ZWkuY29tPiB3cm90 ZToKPiA+Cj4gPiBGcm9tOiBqaWFuZ2Rvbmd4dSA8amlhbmdkb25neHUxQGh1YXdlaS5jb20+Cj4g Pgo+ID4gQ3VycmVudGx5LCB0aGUgdmRwYSBkZXZpY2Ugc3VwcG9ydHMgc3VzcGVuZCBhbmQgcmVz dW1lIG9wZXJhdGlvbnMuCj4gPiBUbyBzdXBwb3J0IHZkcGEgZGV2aWNlIGxpdmUgbWlncmF0aW9u LCB3ZSBuZWVkIHRvIHN1cHBvcnQgbG9nZ2luZwo+ID4gb3BlcmF0aW9ucyBhbmQgZGV2aWNlIHN0 YXRlIHNhdmUvbG9hZCBvcGVydGlvbnMuCj4gPgo+ID4gVGhlc2Ugc2VyaWVzIGludHJvZHVjZXMg c29tZSBuZXcgb3BlcmF0aW9ucyBmb3IgdmRwYSBkZXZpY2VzLgo+ID4gVGhleSBhbGxvdyB2ZHBh IHRvIGVuYWJsZSBsb2dnaW5nIHdoaWxlIHZtIHN0YXJ0IGxpdmUgbWlncmF0aW9uLgo+ID4KPiA+ IEFuZCBJIHdpbGwgc3VibWl0IGFub3RoZXIgcGF0Y2hlcyBhYm91dCBzYXZpbmcgYW5kIGxvYWRp bmcKPiA+IHZkcGEgZGV2aWNlIHN0YXRlIGxhdGVyLgo+IAo+IFRoYW5rcyBmb3Igd29ya2luZyBv biB0aGlzLCBJIGhhdmUgc2V2ZXJhbCBxdWVzdGlvbnM6Cj4gCj4gMSkgSXMgdGhlcmUgYW4gZXhh bXBsZSBpbXBsZW1lbnRhdGlvbiBvZiB0aGUgbG9nZ2luZyBpbiB0aGUgZHJpdmVycz8KPiBXZSBu ZWVkIGEgcmVhbCB1c2VyIGluIG9yZGVyIHRvIG1lcmdlIHRoaXMuCj4gMikgSXMgdGhlIGxvZ2dp bmcgYmFzZWQgb24gSU9WQSBvciBWQT8gSG93IHRoZSBETUEgaXNvbGF0aW9uIGlzIGJlaW5nCj4g ZG9uZSB3aXRoIHRoaXM/IERvIHdlIG5lZWQgYSBTRVRfTE9HR0lOR19BU0lEIHVBUEkgZm9yIHRo aXM/IChXZSBoYWQKPiBzb21lIGRpc2N1c3Npb24gb24gdGhpcyBpbiB0aGUgcGFzdCkuCj4gCj4g VGhhbmtzCgoKU2VlbXMgdG8gYmUgc3R1Y2suIERyb3BwZWQgdGhpcyBmb3Igbm93LgoKPiA+Cj4g PiBqaWFuZ2Rvbmd4dSAoMik6Cj4gPiAgIHZkcGE6IGFkZCBsb2cgb3BlcmF0aW9ucwo+ID4gICB2 aG9zdC12ZHBhOiBhZGQgdUFQSSBmb3IgbG9nZ2luZwo+ID4KPiA+ICBkcml2ZXJzL3Zob3N0L3Zk cGEuYyAgICAgICB8IDQ5ICsrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrCj4g PiAgaW5jbHVkZS9saW51eC92ZHBhLmggICAgICAgfCAxNCArKysrKysrKysrKwo+ID4gIGluY2x1 ZGUvdWFwaS9saW51eC92aG9zdC5oIHwgIDQgKysrKwo+ID4gIDMgZmlsZXMgY2hhbmdlZCwgNjcg aW5zZXJ0aW9ucygrKQo+ID4KPiA+IC0tCj4gPiAyLjI3LjAKPiA+CgpfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpWaXJ0dWFsaXphdGlvbiBtYWlsaW5nIGxp c3QKVmlydHVhbGl6YXRpb25AbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0 cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vdmlydHVhbGl6YXRpb24= 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1E7DCDB47E for ; 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Wed, 18 Oct 2023 08:07:42 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGy/4zb+S5NM6sEmS0XLktdnB9E2DgK42NBe1FM60xzp+eEpX+jYGqKyBED2FMOWx4ESBVAZQ== X-Received: by 2002:a19:740e:0:b0:507:a1dd:5a86 with SMTP id v14-20020a19740e000000b00507a1dd5a86mr4098704lfe.13.1697641662008; Wed, 18 Oct 2023 08:07:42 -0700 (PDT) Received: from redhat.com ([2a02:14f:1f2:2037:f34:d61b:7da0:a7be]) by smtp.gmail.com with ESMTPSA id i18-20020a05600c355200b00407752bd834sm1932821wmq.1.2023.10.18.08.07.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Oct 2023 08:07:41 -0700 (PDT) Date: Wed, 18 Oct 2023 11:07:31 -0400 From: "Michael S. Tsirkin" To: Jason Wang Cc: Jiang Dongxu , virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org, longpeng2@huawei.com, eric.fangyi@huawei.com, eperezma , Siwei Liu Subject: Re: [PATCH 0/2] vdpa: Add logging operatins Message-ID: <20231018110719-mutt-send-email-mst@kernel.org> References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Sep 11, 2023 at 02:56:58PM +0800, Jason Wang wrote: > Adding Eugenio and Si Wei. > > On Sat, Aug 26, 2023 at 9:24 AM Jiang Dongxu wrote: > > > > From: jiangdongxu > > > > Currently, the vdpa device supports suspend and resume operations. > > To support vdpa device live migration, we need to support logging > > operations and device state save/load opertions. > > > > These series introduces some new operations for vdpa devices. > > They allow vdpa to enable logging while vm start live migration. > > > > And I will submit another patches about saving and loading > > vdpa device state later. > > Thanks for working on this, I have several questions: > > 1) Is there an example implementation of the logging in the drivers? > We need a real user in order to merge this. > 2) Is the logging based on IOVA or VA? How the DMA isolation is being > done with this? Do we need a SET_LOGGING_ASID uAPI for this? (We had > some discussion on this in the past). > > Thanks Seems to be stuck. Dropped this for now. > > > > jiangdongxu (2): > > vdpa: add log operations > > vhost-vdpa: add uAPI for logging > > > > drivers/vhost/vdpa.c | 49 ++++++++++++++++++++++++++++++++++++++ > > include/linux/vdpa.h | 14 +++++++++++ > > include/uapi/linux/vhost.h | 4 ++++ > > 3 files changed, 67 insertions(+) > > > > -- > > 2.27.0 > >