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d="scan'208";a="434067658" Received: from allen-box.sh.intel.com (HELO [10.239.159.128]) ([10.239.159.128]) by fmsmga004.fm.intel.com with ESMTP; 18 Mar 2021 17:24:47 -0700 Subject: =?UTF-8?Q?Re=3a_A_problem_of_Intel_IOMMU_hardware_=ef=bc=9f?= To: "Tian, Kevin" , "Longpeng (Mike, Cloud Infrastructure Service Product Dept.)" , Nadav Amit References: <670baaf8-4ff8-4e84-4be3-030b95ab5a5e@huawei.com> <6a218e7fe42d41489d02f0b4e3ad2756@huawei.com> <98DB71EF-FF98-4509-85EC-26FF50825A58@gmail.com> <4d1c3bc0418e48b1b9d44799d65ea375@huawei.com> From: Lu Baolu Message-ID: Date: Fri, 19 Mar 2021 08:15:33 +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: Content-Language: en-US Cc: chenjiashang , David Woodhouse , "iommu@lists.linux-foundation.org" , LKML , "alex.williamson@redhat.com" , "Gonglei \(Arei\)" , "will@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="utf-8"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" T24gMy8xOC8yMSA0OjU2IFBNLCBUaWFuLCBLZXZpbiB3cm90ZToKPj4gRnJvbTogTG9uZ3Blbmcg KE1pa2UsIENsb3VkIEluZnJhc3RydWN0dXJlIFNlcnZpY2UgUHJvZHVjdCBEZXB0LikKPj4gPGxv bmdwZW5nMkBodWF3ZWkuY29tPgo+Pgo+Pj4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0KPj4+ IEZyb206IFRpYW4sIEtldmluIFttYWlsdG86a2V2aW4udGlhbkBpbnRlbC5jb21dCj4+PiBTZW50 OiBUaHVyc2RheSwgTWFyY2ggMTgsIDIwMjEgNDoyNyBQTQo+Pj4gVG86IExvbmdwZW5nIChNaWtl LCBDbG91ZCBJbmZyYXN0cnVjdHVyZSBTZXJ2aWNlIFByb2R1Y3QgRGVwdC4pCj4+PiA8bG9uZ3Bl bmcyQGh1YXdlaS5jb20+OyBOYWRhdiBBbWl0IDxuYWRhdi5hbWl0QGdtYWlsLmNvbT4KPj4+IENj OiBjaGVuamlhc2hhbmcgPGNoZW5qaWFzaGFuZ0BodWF3ZWkuY29tPjsgRGF2aWQgV29vZGhvdXNl Cj4+PiA8ZHdtdzJAaW5mcmFkZWFkLm9yZz47IGlvbW11QGxpc3RzLmxpbnV4LWZvdW5kYXRpb24u b3JnOyBMS01MCj4+PiA8bGludXgta2VybmVsQHZnZXIua2VybmVsLm9yZz47IGFsZXgud2lsbGlh bXNvbkByZWRoYXQuY29tOyBHb25nbGVpCj4+IChBcmVpKQo+Pj4gPGFyZWkuZ29uZ2xlaUBodWF3 ZWkuY29tPjsgd2lsbEBrZXJuZWwub3JnCj4+PiBTdWJqZWN0OiBSRTogQSBwcm9ibGVtIG9mIElu dGVsIElPTU1VIGhhcmR3YXJlIO+8nwo+Pj4KPj4+PiBGcm9tOiBpb21tdSA8aW9tbXUtYm91bmNl c0BsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZz4gT24gQmVoYWxmIE9mCj4+Pj4gTG9uZ3Blbmcg KE1pa2UsIENsb3VkIEluZnJhc3RydWN0dXJlIFNlcnZpY2UgUHJvZHVjdCBEZXB0LikKPj4+Pgo+ Pj4+PiAyLiBDb25zaWRlciBlbnN1cmluZyB0aGF0IHRoZSBwcm9ibGVtIGlzIG5vdCBzb21laG93 IHJlbGF0ZWQgdG8KPj4+Pj4gcXVldWVkIGludmFsaWRhdGlvbnMuIFRyeSB0byB1c2UgX19pb21t dV9mbHVzaF9pb3RsYigpIGluc3RlYWQgb2YKPj4+IHFpX2ZsdXNoX2lvdGxiKCkuCj4+Pj4+Cj4+ Pj4KPj4+PiBJIHRyaWVkIHRvIGZvcmNlIHRvIHVzZSBfX2lvbW11X2ZsdXNoX2lvdGxiKCksIGJ1 dCBtYXliZSBzb21ldGhpbmcKPj4+PiB3cm9uZywgdGhlIHN5c3RlbSBjcmFzaGVkLCBzbyBJIHBy ZWZlciB0byBsb3dlciB0aGUgcHJpb3JpdHkgb2YgdGhpcwo+PiBvcGVyYXRpb24uCj4+Pj4KPj4+ Cj4+PiBUaGUgVlQtZCBzcGVjIGNsZWFybHkgc2F5cyB0aGF0IHJlZ2lzdGVyLWJhc2VkIGludmFs aWRhdGlvbiBjYW4gYmUgdXNlZCBvbmx5Cj4+IHdoZW4KPj4+IHF1ZXVlZC1pbnZhbGlkYXRpb25z IGFyZSBub3QgZW5hYmxlZC4gSW50ZWwtSU9NTVUgZHJpdmVyIGRvZXNuJ3QgcHJvdmlkZQo+PiBh bgo+Pj4gb3B0aW9uIHRvIGRpc2FibGUgcXVldWVkLWludmFsaWRhdGlvbiB0aG91Z2gsIHdoZW4g dGhlIGhhcmR3YXJlIGlzCj4+IGNhcGFibGUuIElmIHlvdQo+Pj4gcmVhbGx5IHdhbnQgdG8gdHJ5 LCB0d2VhayB0aGUgY29kZSBpbiBpbnRlbF9pb21tdV9pbml0X3FpLgo+Pj4KPj4KPj4gSGkgS2V2 aW4sCj4+Cj4+IFRoYW5rcyB0byBwb2ludCBvdXQgdGhpcy4gRG8geW91IGhhdmUgYW55IGlkZWFz IGFib3V0IHRoaXMgcHJvYmxlbSA/IEkgdHJpZWQKPj4gdG8gZGVzY3JpcHQgdGhlIHByb2JsZW0g bXVjaCBjbGVhciBpbiBteSByZXBseSB0byBBbGV4LCBob3BlIHlvdSBjb3VsZCBoYXZlCj4+IGEg bG9vayBpZiB5b3UncmUgaW50ZXJlc3RlZC4KPj4KPiAKPiBidHcgSSBzYXcgeW91IHVzZWQgNC4x OCBrZXJuZWwgaW4gdGhpcyB0ZXN0LiBXaGF0IGFib3V0IGxhdGVzdCBrZXJuZWw/Cj4gCj4gQWxz byBvbmUgd2F5IHRvIHNlcGFyYXRlIHN3L2h3IGJ1ZyBpcyB0byB0cmFjZSB0aGUgbG93IGxldmVs IGludGVyZmFjZSAoZS5nLiwKPiBxaV9mbHVzaF9pb3RsYikgd2hpY2ggYWN0dWFsbHkgc2VuZHMg aW52YWxpZGF0aW9uIGRlc2NyaXB0b3JzIHRvIHRoZSBJT01NVQo+IGhhcmR3YXJlLiBDaGVjayB0 aGUgd2luZG93IGJldHdlZW4gYikgYW5kIGMpIGFuZCBzZWUgd2hldGhlciB0aGUKPiBzb2Z0d2Fy ZSBkb2VzIHRoZSByaWdodCB0aGluZyBhcyBleHBlY3RlZCB0aGVyZS4KClllcy4gSXQncyBiZXR0 ZXIgaWYgd2UgY2FuIHJlcHJvZHVjZSB0aGlzIHdpdGggdGhlIGxhdGVzdCBrZXJuZWwgd2hpY2gK aGFzIGRlYnVnZnMgZmlsZXMgdG8gZXhwb3NlIHBhZ2UgdGFibGVzIGFuZCB0aGUgaW52YWxpZGF0 aW9uIHF1ZXVlcyBldGMuCgpCZXN0IHJlZ2FyZHMsCmJhb2x1Cl9fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fCmlvbW11IG1haWxpbmcgbGlzdAppb21tdUBsaXN0 cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcv bWFpbG1hbi9saXN0aW5mby9pb21tdQ==