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Mon, 07 Jun 2021 18:00:27 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwYWbmdIHR4JeIkPyMKnrD47V0fE4/gLC34oE2C1BXzJ6Yk+6wQV2cQXaOEH+lTIww5tPr8Pg== X-Received: by 2002:a17:90a:db0f:: with SMTP id g15mr1973123pjv.156.1623114026742; Mon, 07 Jun 2021 18:00:26 -0700 (PDT) Received: from wangxiaodeMacBook-Air.local ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id w142sm9258485pff.154.2021.06.07.18.00.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 07 Jun 2021 18:00:26 -0700 (PDT) Subject: Re: [RFC] /dev/ioasid uAPI proposal To: Jason Gunthorpe References: <20210602120111.5e5bcf93.alex.williamson@redhat.com> <20210602180925.GH1002214@nvidia.com> <20210602130053.615db578.alex.williamson@redhat.com> <20210602195404.GI1002214@nvidia.com> <20210602143734.72fb4fa4.alex.williamson@redhat.com> <6a9426d7-ed55-e006-9c4c-6b7c78142e39@redhat.com> <20210603130927.GZ1002214@nvidia.com> <65614634-1db4-7119-1a90-64ba5c6e9042@redhat.com> <20210604115805.GG1002214@nvidia.com> <895671cc-5ef8-bc1a-734c-e9e2fdf03652@redhat.com> <20210607141424.GF1002214@nvidia.com> From: Jason Wang Message-ID: <1cf9651a-b8ee-11f1-1f70-db3492a76400@redhat.com> Date: Tue, 8 Jun 2021 09:00:15 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <20210607141424.GF1002214@nvidia.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: Jean-Philippe Brucker , "Tian, Kevin" , "Jiang, Dave" , "Raj, Ashok" , "kvm@vger.kernel.org" , Jonathan Corbet , David Woodhouse , LKML , "iommu@lists.linux-foundation.org" , Alex Williamson , Gerd Hoffmann , Kirti Wankhede , Robin Murphy , David Gibson 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" CtTaIDIwMjEvNi83IM/CzucxMDoxNCwgSmFzb24gR3VudGhvcnBlINC0tcA6Cj4gT24gTW9uLCBK dW4gMDcsIDIwMjEgYXQgMTE6MTg6MzNBTSArMDgwMCwgSmFzb24gV2FuZyB3cm90ZToKPgo+PiBO b3RlIHRoYXQgbm8gZHJpdmVycyBjYWxsIHRoZXNlIHRoaW5ncyBkb2Vzbid0IG1lYW50IGl0IHdh cyBub3QKPj4gc3VwcG9ydGVkIGJ5IHRoZSBzcGVjLgo+IE9mIGNvdXJzZSBpdCBkb2VzLiBJZiB0 aGUgc3BlYyBkb2Vzbid0IGRlZmluZSBleGFjdGx5IHdoZW4gdGhlIGRyaXZlcgo+IHNob3VsZCBj YWxsIHRoZSBjYWNoZSBmbHVzaGVzIGZvciBuby1zbm9vcCB0cmFuc2FjdGlvbnMgdGhlbiB0aGUK PiBwcm90b2NvbCBkb2Vzbid0IHN1cHBvcnQgbm8tc29vcC4KCgpKdXN0IHRvIG1ha2Ugc3VyZSB3 ZSBhcmUgaW4gdGhlIHNhbWUgcGFnZS4gV2hhdCBJIG1lYW50IGlzLCBpZiB0aGUgRE1BIApiZWhh dmlvciBsaWtlIChuby1zbm9vcCkgaXMgZGV2aWNlIHNwZWNpZmljLiBUaGVyZSdzIG5vIG5lZWQg dG8gbWFuZGF0ZSAKYSB2aXJ0aW8gZ2VuZXJhbCBhdHRyaWJ1dGVzLiBXZSBjYW4gZGVzY3JpYmUg aXQgcGVyIGRldmljZS4gVGhlIGRldmljZXMgCmltcGxlbWVudGVkIGluIHRoZSBjdXJyZW50IHNw ZWMgZG9lcyBub3QgdXNlIG5vbi1jb2hlcmVudCBETUEgZG9lc24ndCAKbWVhbiBhbnkgZnV0dXJl IGRldmljZXMgd29uJ3QgZG8gdGhhdC4gVGhlIGRyaXZlciBjb3VsZCBjaG9vc2UgdG8gdXNlIAp0 cmFuc3BvcnQgKGUuZyBQQ0kpLCBwbGF0Zm9ybSAoQUNQSSkgb3IgZGV2aWNlIHNwZWNpZmljIChn ZW5lcmFsIHZpcnRpbyAKY29tbWFuZCkgd2F5IHRvIGRldGVjdCBhbmQgZmx1c2ggY2FjaGUgd2hl biBuZWNlc3NhcnkuCgoKPgo+IG5vLXNub29wIGlzIG9ubHkgdXNlZCBpbiB2ZXJ5IHNwZWNpZmlj IHNlcXVlbmNlcyBvZiBvcGVyYXRpb25zLCBsaWtlCj4gY2VydGFpbiBHUFUgdXNhZ2VzLCBiZWNh dXNlIHJlZ2FpbmluZyBjb2hlcmVuY2Ugb24geDg2IGlzIGluY3JlZGlibHkKPiBleHBlbnNpdmUu Cj4KPiBpZSBJIHdvdWxkbid0IGV2ZXIgZXhwZWN0IGEgTklDIHRvIHVzZSBuby1zbm9vcCBiZWNh dXNlIE5JQydzIGV4cGVjdAo+IHBhY2tldHMgdG8gYmUgcHJvY2Vzc2VkIGJ5IHRoZSBDUFUuCgoK Rm9yIE5JQyB5ZXMuIEJ1dCB2aXJ0aW8gaXMgbW9yZSB0aGF0IGp1c3QgTklDLiBXZSd2ZSBhbHJl YWR5IHN1cHBvcnRlZCAKR1BVIGFuZCBjcnlwdG8gZGV2aWNlcy4gSW4gdGhpcyBjYXNlLCBuby1z bm9vcCB3aWxsIGJlIHVzZWZ1bCBzaW5jZSB0aGUgCmRhdGEgaXMgbm90IG5lY2Vzc2FyaWx5IGV4 cGVjdGVkIHRvIGJlIHByb2Nlc3NlZCBieSBDUFUuCgpBbmQgYSBsb3Qgb2Ygb3RoZXIgdHlwZSBv ZiBkZXZpY2VzIGFyZSBiZWluZyBwcm9wb3NlZC4KClRoYW5rcwoKCj4KPiAibm9uLWNvaGVyZW50 IERNQSIgaXMgc29tZSBnZW5lcmFsIGV1cGhlbWlzbSB0aGF0IGV2b2tlcyBpbWFnZXMgb2YKPiBl bWJlZGRlZCBwbGF0Zm9ybXMgdGhhdCBkb24ndCBoYXZlIGNvaGVyZW50IERNQSBhdCBhbGwgYW5k IGhhdmUgbG93Cj4gY29zdCB3YXlzIHRvIHJlZ2FpbiBjb2hlcmVuY2UuIFRoaXMgaXMgbm90IGF0 IGFsbCB3aGF0IHdlIGFyZSB0YWxraW5nCj4gYWJvdXQgaGVyZSBhdCBhbGwuCj4gICAKPiBKYXNv bgo+CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwppb21t dSBtYWlsaW5nIGxpc3QKaW9tbXVAbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9s aXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vaW9tbXU=