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bh=61kBWcJtmQFIvGjS1IKO0RhJ1LrkMQqyt5uWZQ6fQwI=; b=P4NHjfcSD8KOO5BQ95x1Yc1YI2hgOvjWQzpXnZ2f1SCvTFlgRW6xHkJa0GXsFetw2pshxB pjAZ3JdLhTqSf5zgeSV3YysFZZFPlZUI6MLWs9jxkYyMHK6KfDuGjp6ebfi9Pt/IsAiVmE dtWDKK6f2Uzh508m1VLwRXSF25sKZ2I= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-60-pTfqDSdGP9CR1YEzofLBAw-1; Tue, 19 Jan 2021 22:47:02 -0500 X-MC-Unique: pTfqDSdGP9CR1YEzofLBAw-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id AD934800D53; Wed, 20 Jan 2021 03:47:00 +0000 (UTC) Received: from [10.72.13.124] (ovpn-13-124.pek2.redhat.com [10.72.13.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0DB3E9CA0; Wed, 20 Jan 2021 03:46:39 +0000 (UTC) Subject: Re: [RFC v3 03/11] vdpa: Remove the restriction that only supports virtio-net devices To: Xie Yongji , mst@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, bob.liu@oracle.com, hch@infradead.org, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net References: <20210119045920.447-1-xieyongji@bytedance.com> <20210119045920.447-4-xieyongji@bytedance.com> From: Jason Wang Message-ID: <310d7793-e4ff-fba3-f358-418cb64c7988@redhat.com> Date: Wed, 20 Jan 2021 11:46:38 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20210119045920.447-4-xieyongji@bytedance.com> Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Cc: linux-aio@kvack.org, netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org 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" Ck9uIDIwMjEvMS8xOSDkuIvljYgxMjo1OSwgWGllIFlvbmdqaSB3cm90ZToKPiBXaXRoIFZEVVNF LCB3ZSBzaG91bGQgYmUgYWJsZSB0byBzdXBwb3J0IGFsbCBraW5kcyBvZiB2aXJ0aW8gZGV2aWNl cy4KPgo+IFNpZ25lZC1vZmYtYnk6IFhpZSBZb25namkgPHhpZXlvbmdqaUBieXRlZGFuY2UuY29t Pgo+IC0tLQo+ICAgZHJpdmVycy92aG9zdC92ZHBhLmMgfCAyOSArKystLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLQo+ICAgMSBmaWxlIGNoYW5nZWQsIDMgaW5zZXJ0aW9ucygrKSwgMjYgZGVsZXRp b25zKC0pCj4KPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy92aG9zdC92ZHBhLmMgYi9kcml2ZXJzL3Zo b3N0L3ZkcGEuYwo+IGluZGV4IDI5ZWQ0MTczZjA0ZS4uNDQ4YmU3ODc1YjZkIDEwMDY0NAo+IC0t LSBhL2RyaXZlcnMvdmhvc3QvdmRwYS5jCj4gKysrIGIvZHJpdmVycy92aG9zdC92ZHBhLmMKPiBA QCAtMjIsNiArMjIsNyBAQAo+ICAgI2luY2x1ZGUgPGxpbnV4L25vc3BlYy5oPgo+ICAgI2luY2x1 ZGUgPGxpbnV4L3Zob3N0Lmg+Cj4gICAjaW5jbHVkZSA8bGludXgvdmlydGlvX25ldC5oPgo+ICsj aW5jbHVkZSA8bGludXgvdmlydGlvX2Jsay5oPgo+ICAgCj4gICAjaW5jbHVkZSAidmhvc3QuaCIK PiAgIAo+IEBAIC0xODUsMjYgKzE4Niw2IEBAIHN0YXRpYyBsb25nIHZob3N0X3ZkcGFfc2V0X3N0 YXR1cyhzdHJ1Y3Qgdmhvc3RfdmRwYSAqdiwgdTggX191c2VyICpzdGF0dXNwKQo+ICAgCXJldHVy biAwOwo+ICAgfQo+ICAgCj4gLXN0YXRpYyBpbnQgdmhvc3RfdmRwYV9jb25maWdfdmFsaWRhdGUo c3RydWN0IHZob3N0X3ZkcGEgKnYsCj4gLQkJCQkgICAgICBzdHJ1Y3Qgdmhvc3RfdmRwYV9jb25m aWcgKmMpCj4gLXsKPiAtCWxvbmcgc2l6ZSA9IDA7Cj4gLQo+IC0Jc3dpdGNoICh2LT52aXJ0aW9f aWQpIHsKPiAtCWNhc2UgVklSVElPX0lEX05FVDoKPiAtCQlzaXplID0gc2l6ZW9mKHN0cnVjdCB2 aXJ0aW9fbmV0X2NvbmZpZyk7Cj4gLQkJYnJlYWs7Cj4gLQl9Cj4gLQo+IC0JaWYgKGMtPmxlbiA9 PSAwKQo+IC0JCXJldHVybiAtRUlOVkFMOwo+IC0KPiAtCWlmIChjLT5sZW4gPiBzaXplIC0gYy0+ b2ZmKQo+IC0JCXJldHVybiAtRTJCSUc7Cj4gLQo+IC0JcmV0dXJuIDA7Cj4gLX0KCgpJIHRoaW5r IHdlIHNob3VsZCB1c2UgYSBzZXBhcmF0ZSBwYXRjaCBmb3IgdGhpcy4KClRoYW5rcwoKCj4gLQo+ ICAgc3RhdGljIGxvbmcgdmhvc3RfdmRwYV9nZXRfY29uZmlnKHN0cnVjdCB2aG9zdF92ZHBhICp2 LAo+ICAgCQkJCSAgc3RydWN0IHZob3N0X3ZkcGFfY29uZmlnIF9fdXNlciAqYykKPiAgIHsKPiBA QCAtMjE1LDcgKzE5Niw3IEBAIHN0YXRpYyBsb25nIHZob3N0X3ZkcGFfZ2V0X2NvbmZpZyhzdHJ1 Y3Qgdmhvc3RfdmRwYSAqdiwKPiAgIAo+ICAgCWlmIChjb3B5X2Zyb21fdXNlcigmY29uZmlnLCBj LCBzaXplKSkKPiAgIAkJcmV0dXJuIC1FRkFVTFQ7Cj4gLQlpZiAodmhvc3RfdmRwYV9jb25maWdf dmFsaWRhdGUodiwgJmNvbmZpZykpCj4gKwlpZiAoY29uZmlnLmxlbiA9PSAwKQo+ICAgCQlyZXR1 cm4gLUVJTlZBTDsKPiAgIAlidWYgPSBrdnphbGxvYyhjb25maWcubGVuLCBHRlBfS0VSTkVMKTsK PiAgIAlpZiAoIWJ1ZikKPiBAQCAtMjQzLDcgKzIyNCw3IEBAIHN0YXRpYyBsb25nIHZob3N0X3Zk cGFfc2V0X2NvbmZpZyhzdHJ1Y3Qgdmhvc3RfdmRwYSAqdiwKPiAgIAo+ICAgCWlmIChjb3B5X2Zy b21fdXNlcigmY29uZmlnLCBjLCBzaXplKSkKPiAgIAkJcmV0dXJuIC1FRkFVTFQ7Cj4gLQlpZiAo dmhvc3RfdmRwYV9jb25maWdfdmFsaWRhdGUodiwgJmNvbmZpZykpCj4gKwlpZiAoY29uZmlnLmxl biA9PSAwKQo+ICAgCQlyZXR1cm4gLUVJTlZBTDsKPiAgIAlidWYgPSBrdnphbGxvYyhjb25maWcu bGVuLCBHRlBfS0VSTkVMKTsKPiAgIAlpZiAoIWJ1ZikKPiBAQCAtMTAyNSwxMCArMTAwNiw2IEBA IHN0YXRpYyBpbnQgdmhvc3RfdmRwYV9wcm9iZShzdHJ1Y3QgdmRwYV9kZXZpY2UgKnZkcGEpCj4g ICAJaW50IG1pbm9yOwo+ICAgCWludCByOwo+ICAgCj4gLQkvKiBDdXJyZW50bHksIHdlIG9ubHkg YWNjZXB0IHRoZSBuZXR3b3JrIGRldmljZXMuICovCj4gLQlpZiAob3BzLT5nZXRfZGV2aWNlX2lk KHZkcGEpICE9IFZJUlRJT19JRF9ORVQpCj4gLQkJcmV0dXJuIC1FTk9UU1VQUDsKPiAtCj4gICAJ diA9IGt6YWxsb2Moc2l6ZW9mKCp2KSwgR0ZQX0tFUk5FTCB8IF9fR0ZQX1JFVFJZX01BWUZBSUwp Owo+ICAgCWlmICghdikKPiAgIAkJcmV0dXJuIC1FTk9NRU07CgpfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXwpWaXJ0dWFsaXphdGlvbiBtYWlsaW5nIGxpc3QK VmlydHVhbGl6YXRpb25AbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5s aW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vdmlydHVhbGl6YXRpb24=