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Mon, 31 May 2021 23:07:15 -0700 (PDT) X-Google-Smtp-Source: ABdhPJy061Dy19iHLayhC8IX/sic1Xj79JCDr5oreU6IxvFEXjUpr+lVQ790JMBSTMUZPvKcvJ5VZQ== X-Received: by 2002:a62:1856:0:b029:2e9:c6ef:3b34 with SMTP id 83-20020a6218560000b02902e9c6ef3b34mr10235727pfy.65.1622527635026; Mon, 31 May 2021 23:07:15 -0700 (PDT) Received: from wangxiaodeMacBook-Air.local ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id 25sm12058529pfh.39.2021.05.31.23.07.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 31 May 2021 23:07:14 -0700 (PDT) Subject: Re: [RFC] /dev/ioasid uAPI proposal To: "Tian, Kevin" , Lu Baolu , Liu Yi L References: <20210531164118.265789ee@yiliu-dev> <78ee2638-1a03-fcc8-50a5-81040f677e69@redhat.com> <20210601113152.6d09e47b@yiliu-dev> <164ee532-17b0-e180-81d3-12d49b82ac9f@redhat.com> <64898584-a482-e6ac-fd71-23549368c508@linux.intel.com> <429d9c2f-3597-eb29-7764-fad3ec9a934f@redhat.com> From: Jason Wang Message-ID: <05d7f790-870d-5551-1ced-86926a0aa1a6@redhat.com> Date: Tue, 1 Jun 2021 14:07:05 +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: "kvm@vger.kernel.org" , Jonathan Corbet , "iommu@lists.linux-foundation.org" , LKML , "Alex Williamson \(alex.williamson@redhat.com\)\"\"" , Jason Gunthorpe , David Woodhouse 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="utf-8"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" CuWcqCAyMDIxLzYvMSDkuIvljYgxOjQyLCBUaWFuLCBLZXZpbiDlhpnpgZM6Cj4+IEZyb206IEph c29uIFdhbmcKPj4gU2VudDogVHVlc2RheSwgSnVuZSAxLCAyMDIxIDE6MzAgUE0KPj4KPj4g5Zyo IDIwMjEvNi8xIOS4i+WNiDE6MjMsIEx1IEJhb2x1IOWGmemBkzoKPj4+IEhpIEphc29uIFcsCj4+ Pgo+Pj4gT24gNi8xLzIxIDE6MDggUE0sIEphc29uIFdhbmcgd3JvdGU6Cj4+Pj4+PiAyKSBJZiB5 ZXMsIHdoYXQncyB0aGUgcmVhc29uIGZvciBub3Qgc2ltcGx5IHVzZSB0aGUgZmQgb3BlbmVkIGZy b20KPj4+Pj4+IC9kZXYvaW9hcy4gKFRoaXMgaXMgdGhlIHF1ZXN0aW9uIHRoYXQgaXMgbm90IGFu c3dlcmVkKSBhbmQgd2hhdAo+Pj4+Pj4gaGFwcGVucwo+Pj4+Pj4gaWYgd2UgY2FsbCBHRVRfSU5G TyBmb3IgdGhlIGlvYXNpZF9mZD8KPj4+Pj4+IDMpIElmIG5vdCwgaG93IEdFVF9JTkZPIHdvcms/ Cj4+Pj4+IG9oLCBtaXNzZWQgdGhpcyBxdWVzdGlvbiBpbiBwcmlvciByZXBseS4gUGVyc29uYWxs eSwgbm8gc3BlY2lhbCByZWFzb24KPj4+Pj4geWV0LiBCdXQgdXNpbmcgSUQgbWF5IGdpdmUgdXMg b3Bwb3J0dW5pdHkgdG8gY3VzdG9taXplIHRoZSBtYW5hZ2VtZW50Cj4+Pj4+IG9mIHRoZSBoYW5k bGUuIEZvciBvbmUsIGJldHRlciBsb29rdXAgZWZmaWNpZW5jeSBieSB1c2luZyB4YXJyYXkgdG8K Pj4+Pj4gc3RvcmUgdGhlIGFsbG9jYXRlZCBJRHMuIEZvciB0d28sIGNvdWxkIGNhdGVnb3JpemUg dGhlIGFsbG9jYXRlZCBJRHMKPj4+Pj4gKHBhcmVudCBvciBuZXN0ZWQpLiBHRVRfSU5GTyBqdXN0 IHdvcmtzIHdpdGggYW4gaW5wdXQgRkQgYW5kIGFuIElELgo+Pj4+Cj4+Pj4gSSdtIG5vdCBzdXJl IEkgZ2V0IHRoaXMsIGZvciBuZXN0aW5nIGNhc2VzIHlvdSBjYW4gc3RpbGwgbWFrZSB0aGUKPj4+ PiBjaGlsZCBhbiBmZC4KPj4+Pgo+Pj4+IEFuZCBhIHF1ZXN0aW9uIHN0aWxsLCB1bmRlciB3aGF0 IGNhc2Ugd2UgbmVlZCB0byBjcmVhdGUgbXVsdGlwbGUKPj4+PiBpb2FzaWRzIG9uIGEgc2luZ2xl IGlvYXNpZCBmZD8KPj4+IE9uZSBwb3NzaWJsZSBzaXR1YXRpb24gd2hlcmUgbXVsdGlwbGUgSU9B U0lEcyBwZXIgRkQgY291bGQgYmUgdXNlZCBpcwo+Pj4gdGhhdCBkZXZpY2VzIHdpdGggZGlmZmVy ZW50IHVuZGVybHlpbmcgSU9NTVUgY2FwYWJpbGl0aWVzIGFyZSBzaGFyaW5nIGEKPj4+IHNpbmds ZSBGRC4gSW4gdGhpcyBjYXNlLCBvbmx5IGRldmljZXMgd2l0aCBjb25zaXN0ZW50IHVuZGVybHlp bmcgSU9NTVUKPj4+IGNhcGFiaWxpdGllcyBjb3VsZCBiZSBwdXQgaW4gYW4gSU9BU0lEIGFuZCBt dWx0aXBsZSBJT0FTSURzIHBlciBGRCBjb3VsZAo+Pj4gYmUgYXBwbGllZC4KPj4+Cj4+PiBUaG91 Z2gsIEkgc3RpbGwgbm90IHN1cmUgYWJvdXQgIm11bHRpcGxlIElPQVNJRCBwZXItRkQiIHZzICJt dWx0aXBsZQo+Pj4gSU9BU0lEIEZEcyIgZm9yIHN1Y2ggY2FzZS4KPj4KPj4gUmlnaHQsIHRoYXQn cyBleGFjdGx5IG15IHF1ZXN0aW9uLiBUaGUgbGF0dGVyIHNlZW1zIG11Y2ggbW9yZSBlYXNpZXIg dG8KPj4gYmUgdW5kZXJzdG9vZCBhbmQgaW1wbGVtZW50ZWQuCj4+Cj4gQSBzaW1wbGUgcmVhc29u IGRpc2N1c3NlZCBpbiBwcmV2aW91cyB0aHJlYWQgLSB0aGVyZSBjb3VsZCBiZSAxTSdzCj4gSS9P IGFkZHJlc3Mgc3BhY2VzIHBlciBkZXZpY2Ugd2hpbGUgI0ZEJ3MgYXJlIHByZWNpb3VzIHJlc291 cmNlLgoKCklzIHRoZSBjb25jZXJuIGZvciB1bGltaXQgb3IgcGVyZm9ybWFuY2U/IE5vdGUgdGhh dCB3ZSBoYWQKCiNkZWZpbmUgTlJfT1BFTl9NQVggfjBVCgpBbmQgd2l0aCB0aGUgZmQgc2VtYW50 aWMsIHlvdSBjYW4gZG8gYSBsb3Qgb2Ygb3RoZXIgc3R1ZmZzOiBjbG9zZSBvbiAKZXhlYywgcGFz c2luZyB2aWEgU0NNX1JJR0hUUy4KCkZvciB0aGUgY2FzZSBvZiAxTSwgSSB3b3VsZCBsaWtlIHRv IGtub3cgd2hhdCdzIHRoZSB1c2UgY2FzZSBmb3IgYSAKc2luZ2xlIHByb2Nlc3MgdG8gaGFuZGxl IDFNKyBhZGRyZXNzIHNwYWNlcz8KCgo+IFNvIHRoaXMgUkZDIHRyZWF0cyBmZCBhcyBhIGNvbnRh aW5lciBvZiBhZGRyZXNzIHNwYWNlcyB3aGljaCBpcyBlYWNoCj4gdGFnZ2VkIGJ5IGFuIElPQVNJ RC4KCgpJZiB0aGUgY29udGFpbmVyIGFuZCBhZGRyZXNzIHNwYWNlIGlzIDE6MSB0aGVuIHRoZSBj b250YWluZXIgc2VlbXMgdXNlbGVzcy4KClRoYW5rcwoKCj4KPiBUaGFua3MKPiBLZXZpbgoKX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KaW9tbXUgbWFpbGlu ZyBsaXN0CmlvbW11QGxpc3RzLmxpbnV4LWZvdW5kYXRpb24ub3JnCmh0dHBzOi8vbGlzdHMubGlu dXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2lvbW11