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Wed, 26 May 2021 21:13:07 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzNWCYMnMC1HxMoP07R/3S3m3jilU3dNCIEmruTMAtVdxqR2yiJbYdkUNhO/NZQxyTwe/4ddA== X-Received: by 2002:a63:3c0e:: with SMTP id j14mr1842274pga.427.1622088787269; Wed, 26 May 2021 21:13:07 -0700 (PDT) Received: from wangxiaodeMacBook-Air.local ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id c134sm622801pfb.135.2021.05.26.21.13.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 26 May 2021 21:13:06 -0700 (PDT) Subject: Re: [PATCH v7 11/12] vduse: Introduce VDUSE - vDPA Device in Userspace To: Xie Yongji , mst@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, hch@infradead.org, christian.brauner@canonical.com, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net, mika.penttila@nextfour.com, dan.carpenter@oracle.com, joro@8bytes.org References: <20210517095513.850-1-xieyongji@bytedance.com> <20210517095513.850-12-xieyongji@bytedance.com> From: Jason Wang Message-ID: <3740c7eb-e457-07f3-5048-917c8606275d@redhat.com> Date: Thu, 27 May 2021 12:12:58 +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: <20210517095513.850-12-xieyongji@bytedance.com> 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@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, iommu@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org 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="gbk"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" CtTaIDIwMjEvNS8xNyDPws7nNTo1NSwgWGllIFlvbmdqaSDQtLXAOgo+ICsKPiArc3RhdGljIGlu dCB2ZHVzZV9kZXZfbXNnX3N5bmMoc3RydWN0IHZkdXNlX2RldiAqZGV2LAo+ICsJCQkgICAgICBz dHJ1Y3QgdmR1c2VfZGV2X21zZyAqbXNnKQo+ICt7Cj4gKwlpbml0X3dhaXRxdWV1ZV9oZWFkKCZt c2ctPndhaXRxKTsKPiArCXNwaW5fbG9jaygmZGV2LT5tc2dfbG9jayk7Cj4gKwl2ZHVzZV9lbnF1 ZXVlX21zZygmZGV2LT5zZW5kX2xpc3QsIG1zZyk7Cj4gKwl3YWtlX3VwKCZkZXYtPndhaXRxKTsK PiArCXNwaW5fdW5sb2NrKCZkZXYtPm1zZ19sb2NrKTsKPiArCXdhaXRfZXZlbnRfa2lsbGFibGUo bXNnLT53YWl0cSwgbXNnLT5jb21wbGV0ZWQpOwoKCldoYXQgaGFwcGVucyBpZiB0aGUgdXNlcnNw YWNlKG1hbGljb3VzKSBkb2Vzbid0IGdpdmUgYSByZXNwb25zZSBmb3JldmVyPwoKSXQgbG9va3Mg bGlrZSBhIERPUy4gSWYgeWVzLCB3ZSBuZWVkIHRvIGNvbnNpZGVyIGEgd2F5IHRvIGZpeCB0aGF0 LgoKVGhhbmtzCgoKPiArCXNwaW5fbG9jaygmZGV2LT5tc2dfbG9jayk7Cj4gKwlpZiAoIW1zZy0+ Y29tcGxldGVkKSB7Cj4gKwkJbGlzdF9kZWwoJm1zZy0+bGlzdCk7Cj4gKwkJbXNnLT5yZXNwLnJl c3VsdCA9IFZEVVNFX1JFUVVFU1RfRkFJTEVEOwo+ICsJfQo+ICsJc3Bpbl91bmxvY2soJmRldi0+ bXNnX2xvY2spOwo+ICsKPiArCXJldHVybiAobXNnLT5yZXNwLnJlc3VsdCA9PSBWRFVTRV9SRVFV RVNUX09LKSA/IDAgOiAtMTsKPiArfQoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX18KaW9tbXUgbWFpbGluZyBsaXN0CmlvbW11QGxpc3RzLmxpbnV4LWZvdW5k YXRpb24ub3JnCmh0dHBzOi8vbGlzdHMubGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFuL2xpc3Rp bmZvL2lvbW11