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d="scan'208";a="264981824" Received: from allen-box.sh.intel.com (HELO [10.239.159.139]) ([10.239.159.139]) by fmsmga007.fm.intel.com with ESMTP; 29 Jun 2020 18:07:34 -0700 Subject: Re: [PATCH 1/2] iommu: Add iommu_group_get/set_domain() To: Robin Murphy , Joerg Roedel , Alex Williamson References: <20200627031532.28046-1-baolu.lu@linux.intel.com> From: Lu Baolu Message-ID: <5dc1cece-6111-9b56-d04c-9553d592675b@linux.intel.com> Date: Tue, 30 Jun 2020 09:03:11 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Cc: Kevin Tian , Dave Jiang , Ashok Raj , kvm@vger.kernel.org, Cornelia Huck , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.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" SGkgUm9iaW4sCgpPbiA2LzI5LzIwIDc6NTYgUE0sIFJvYmluIE11cnBoeSB3cm90ZToKPiBPbiAy MDIwLTA2LTI3IDA0OjE1LCBMdSBCYW9sdSB3cm90ZToKPj4gVGhlIGhhcmR3YXJlIGFzc2lzdGFu dCB2ZmlvIG1lZGlhdGVkIGRldmljZSBpcyBhIHVzZSBjYXNlIG9mIGlvbW11Cj4+IGF1eC1kb21h aW4uIFRoZSBpbnRlcmFjdGlvbnMgYmV0d2VlbiB2ZmlvL21kZXYgYW5kIGlvbW11IGR1cmluZyBt ZGV2Cj4+IGNyZWF0aW9uIGFuZCBwYXNzdGhyIGFyZToKPj4KPj4gLSBDcmVhdGUgYSBncm91cCBm b3IgbWRldiB3aXRoIGlvbW11X2dyb3VwX2FsbG9jKCk7Cj4+IC0gQWRkIHRoZSBkZXZpY2UgdG8g dGhlIGdyb3VwIHdpdGgKPj4gwqDCoMKgwqDCoMKgwqDCoCBncm91cCA9IGlvbW11X2dyb3VwX2Fs bG9jKCk7Cj4+IMKgwqDCoMKgwqDCoMKgwqAgaWYgKElTX0VSUihncm91cCkpCj4+IMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHJldHVybiBQVFJfRVJSKGdyb3VwKTsKPj4KPj4gwqDC oMKgwqDCoMKgwqDCoCByZXQgPSBpb21tdV9ncm91cF9hZGRfZGV2aWNlKGdyb3VwLCAmbWRldi0+ ZGV2KTsKPj4gwqDCoMKgwqDCoMKgwqDCoCBpZiAoIXJldCkKPj4gwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqAgZGV2X2luZm8oJm1kZXYtPmRldiwgIk1ERVY6IGdyb3VwX2lkID0gJWRc biIsCj4+IMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg IGlvbW11X2dyb3VwX2lkKGdyb3VwKSk7Cj4+IC0gQWxsb2NhdGUgYW4gYXV4LWRvbWFpbgo+PiDC oMKgwqDCoGlvbW11X2RvbWFpbl9hbGxvYygpCj4+IC0gQXR0YWNoIHRoZSBhdXgtZG9tYWluIHRv IHRoZSBwaHlzaWNhbCBkZXZpY2UgZnJvbSB3aGljaCB0aGUgbWRldiBpcwo+PiDCoMKgIGNyZWF0 ZWQuCj4+IMKgwqDCoMKgaW9tbXVfYXV4X2F0dGFjaF9kZXZpY2UoKQo+Pgo+PiBJbiB0aGUgd2hv bGUgcHJvY2VzcywgYW4gaW9tbXUgZ3JvdXAgd2FzIGFsbG9jYXRlZCBmb3IgdGhlIG1kZXYgYW5k IGFuCj4+IGlvbW11IGRvbWFpbiB3YXMgYXR0YWNoZWQgdG8gdGhlIGdyb3VwLCBidXQgdGhlIGdy b3VwLT5kb21haW4gbGVhdmVzCj4+IE5VTEwuIEFzIHRoZSByZXN1bHQsIGlvbW11X2dldF9kb21h aW5fZm9yX2RldigpIGRvZXNuJ3Qgd29yayBhbnltb3JlLgo+Pgo+PiBUaGlzIGFkZHMgaW9tbXVf Z3JvdXBfZ2V0L3NldF9kb21haW4oKSBzbyB0aGF0IGdyb3VwLT5kb21haW4gY291bGQgYmUKPj4g bWFuYWdlZCB3aGVuZXZlciBhIGRvbWFpbiBpcyBhdHRhY2hlZCBvciBkZXRhY2hlZCB0aHJvdWdo IHRoZSBhdXgtZG9tYWluCj4+IGFwaSdzLgo+IAo+IExldHRpbmcgZXh0ZXJuYWwgY2FsbGVycyBw b2tlIGFyb3VuZCBkaXJlY3RseSBpbiB0aGUgaW50ZXJuYWxzIG9mIAo+IGlvbW11X2dyb3VwIGRv ZXNuJ3QgbG9vayByaWdodCB0byBtZS4KClVuZm9ydHVuYXRlbHksIGl0IHNlZW1zIHRoYXQgdGhl IHZpZm8gaW9tbXUgYWJzdHJhY3Rpb24gaXMgZGVlcGx5IGJvdW5kCnRvIHRoZSBJT01NVSBzdWJz eXN0ZW0uIFdlIGNhbiBlYXNpbHkgZmluZCBvdGhlciBleGFtcGxlczoKCmlvbW11X2dyb3VwX2dl dC9zZXRfaW9tbXVkYXRhKCkKaW9tbXVfZ3JvdXBfZ2V0L3NldF9uYW1lKCkKLi4uCgo+IAo+IElm IGEgcmVndWxhciBkZXZpY2UgaXMgYXR0YWNoZWQgdG8gb25lIG9yIG1vcmUgYXV4IGRvbWFpbnMg Zm9yIFBBU0lEIAo+IHVzZSwgaW9tbXVfZ2V0X2RvbWFpbl9mb3JfZGV2KCkgaXMgc3RpbGwgZ29p bmcgdG8gcmV0dXJuIHRoZSBwcmltYXJ5IAo+IGRvbWFpbiwgc28gd2h5IHNob3VsZCBpdCBiZSBl eHBlY3RlZCB0byBiZWhhdmUgZGlmZmVyZW50bHkgZm9yIG1lZGlhdGVkCgpVbmxpa2UgdGhlIG5v cm1hbCBkZXZpY2UgYXR0YWNoLCB3ZSB3aWxsIGVuY291bnRlciB0d28gZGV2aWNlcyB3aGVuIGl0 CmNvbWVzIHRvIGF1eC1kb21haW4uCgotIFBhcmVudCBwaHlzaWNhbCBkZXZpY2UgLSB0aGlzIG1p Z2h0IGJlLCBmb3IgZXhhbXBsZSwgYSBQQ0llIGRldmljZQp3aXRoIFBBU0lEIGZlYXR1cmUgc3Vw cG9ydCwgaGVuY2UgaXQgaXMgYWJsZSB0byB0YWcgYW4gdW5pcXVlIFBBU0lECmZvciBETUEgdHJh bnNmZXJzIG9yaWdpbmF0ZWQgZnJvbSBpdHMgc3Vic2V0LiBUaGUgZGV2aWNlIGRyaXZlciBoZW5j ZQppcyBhYmxlIHRvIHdyYXBwZXIgdGhpcyBzdWJzZXQgaW50byBhbiBpc29sYXRlZDoKCi0gTWVk aWF0ZWQgZGV2aWNlIC0gYSBmYWtlIGRldmljZSBjcmVhdGVkIGJ5IHRoZSBkZXZpY2UgZHJpdmVy IG1lbnRpb25lZAphYm92ZS4KClllcy4gQWxsIHlvdSBtZW50aW9uZWQgYXJlIHJpZ2h0IGZvciB0 aGUgcGFyZW50IGRldmljZS4gQnV0IGZvciBtZWRpYXRlZApkZXZpY2UsIGlvbW11X2dldF9kb21h aW5fZm9yX2RldigpIGRvZXNuJ3Qgd29yayBldmVuIGl0IGhhcyBhbiB2YWxpZAppb21tdV9ncm91 cCBhbmQgaW9tbXVfZG9tYWluLgoKaW9tbXVfZ2V0X2RvbWFpbl9mb3JfZGV2KCkgaXMgYSBuZWNl c3NhcnkgaW50ZXJmYWNlIGZvciBkZXZpY2UgZHJpdmVycwp3aGljaCB3YW50IHRvIHN1cHBvcnQg YXV4LWRvbWFpbi4gRm9yIGV4YW1wbGUsCgogICAgICAgICAgIHN0cnVjdCBpb21tdV9kb21haW4g KmRvbWFpbjsKICAgICAgICAgICBzdHJ1Y3QgZGV2aWNlICpkZXYgPSBtZGV2X2RldihtZGV2KTsK CSAgdW5zaWduZWQgbG9uZyBwYXNpZDsKCiAgICAgICAgICAgZG9tYWluID0gaW9tbXVfZ2V0X2Rv bWFpbl9mb3JfZGV2KGRldik7CiAgICAgICAgICAgaWYgKCFkb21haW4pCiAgICAgICAgICAgICAg ICAgICByZXR1cm4gLUVOT0RFVjsKCiAgICAgICAgICAgcGFzaWQgPSBpb21tdV9hdXhfZ2V0X3Bh c2lkKGRvbWFpbiwgZGV2LT5wYXJlbnQpOwoJICBpZiAocGFzaWQgPT0gSU9BU0lEX0lOVkFMSUQp CgkJICByZXR1cm4gLUVJTlZBTDsKCgkgIC8qIFByb2dyYW0gdGhlIGRldmljZSBjb250ZXh0IHdp dGggdGhlIFBBU0lEIHZhbHVlICovCgkgIC4uLi4KCldpdGhvdXQgdGhpcyBmaXgsIGlvbW11X2dl dF9kb21haW5fZm9yX2RldigpIGFsd2F5cyByZXR1cm5zIE5VTEwgYW5kIHRoZQpkZXZpY2UgZHJp dmVyIGhhcyBubyBtZWFucyB0byBzdXBwb3J0IGF1eC1kb21haW4uCgpCZXN0IHJlZ2FyZHMsCmJh b2x1Cgo+IGRldmljZXM/IEFGQUlDUyBpdCdzIHBlcmZlY3RseSBsZWdpdGltYXRlIHRvIGhhdmUg bm8gcHJpbWFyeSBkb21haW4gaWYgCj4gdHJhZmZpYy13aXRob3V0LVBBU0lEIGlzIGludmFsaWQu Cj4gCj4gUm9iaW4uCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fCmlvbW11IG1haWxpbmcgbGlzdAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpo dHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21tdQ==