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Thu, 5 Mar 2020 10:10:11 -0500 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-19-dq2hfeTOM-OFX6XMs-OnUQ-1; Thu, 05 Mar 2020 15:10:07 +0000 X-MC-Unique: dq2hfeTOM-OFX6XMs-OnUQ-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Thu, 5 Mar 2020 15:10:06 +0000 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Thu, 5 Mar 2020 15:10:06 +0000 From: David Laight To: 'Paolo Bonzini' , linmiaohe , "rkrcmar@redhat.com" , "sean.j.christopherson@intel.com" , "vkuznets@redhat.com" , "jmattson@google.com" , "joro@8bytes.org" , "tglx@linutronix.de" , "mingo@redhat.com" , "bp@alien8.de" , "hpa@zytor.com" CC: "kvm@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "x86@kernel.org" Subject: RE: [PATCH] KVM: x86: small optimization for is_mtrr_mask calculation Thread-Topic: [PATCH] KVM: x86: small optimization for is_mtrr_mask calculation Thread-Index: AQHV8vtgGziz2VnmdUK2S7OlSyi4eKg6GbLw Date: Thu, 5 Mar 2020 15:10:06 +0000 Message-ID: References: <1583376535-27255-1-git-send-email-linmiaohe@huawei.com> <2b678644-fcc0-e853-a53c-2651c1f6a327@redhat.com> In-Reply-To: <2b678644-fcc0-e853-a53c-2651c1f6a327@redhat.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogUGFvbG8gQm9uemluaQ0KPiBTZW50OiAwNSBNYXJjaCAyMDIwIDE0OjM2DQo+IA0KPiBP biAwNS8wMy8yMCAwMzo0OCwgbGlubWlhb2hlIHdyb3RlOg0KPiA+IEZyb206IE1pYW9oZSBMaW4g PGxpbm1pYW9oZUBodWF3ZWkuY29tPg0KPiA+DQo+ID4gV2UgY2FuIGdldCBpc19tdHJyX21hc2sg YnkgY2FsY3VsYXRpbmcgKG1zciAtIDB4MjAwKSAlIDIgZGlyZWN0bHkuDQo+ID4NCj4gPiBTaWdu ZWQtb2ZmLWJ5OiBNaWFvaGUgTGluIDxsaW5taWFvaGVAaHVhd2VpLmNvbT4NCj4gPiAtLS0NCj4g PiAgYXJjaC94ODYva3ZtL210cnIuYyB8IDQgKystLQ0KPiA+ICAxIGZpbGUgY2hhbmdlZCwgMiBp bnNlcnRpb25zKCspLCAyIGRlbGV0aW9ucygtKQ0KPiA+DQo+ID4gZGlmZiAtLWdpdCBhL2FyY2gv eDg2L2t2bS9tdHJyLmMgYi9hcmNoL3g4Ni9rdm0vbXRyci5jDQo+ID4gaW5kZXggN2YwMDU5YWEz MGUxLi5hOTg3MDFkOWYyYmYgMTAwNjQ0DQo+ID4gLS0tIGEvYXJjaC94ODYva3ZtL210cnIuYw0K PiA+ICsrKyBiL2FyY2gveDg2L2t2bS9tdHJyLmMNCj4gPiBAQCAtMzQ4LDcgKzM0OCw3IEBAIHN0 YXRpYyB2b2lkIHNldF92YXJfbXRycl9tc3Ioc3RydWN0IGt2bV92Y3B1ICp2Y3B1LCB1MzIgbXNy LCB1NjQgZGF0YSkNCj4gPiAgCWludCBpbmRleCwgaXNfbXRycl9tYXNrOw0KPiA+DQo+ID4gIAlp bmRleCA9IChtc3IgLSAweDIwMCkgLyAyOw0KPiA+IC0JaXNfbXRycl9tYXNrID0gbXNyIC0gMHgy MDAgLSAyICogaW5kZXg7DQo+ID4gKwlpc19tdHJyX21hc2sgPSAobXNyIC0gMHgyMDApICUgMjsN Cj4gPiAgCWN1ciA9ICZtdHJyX3N0YXRlLT52YXJfcmFuZ2VzW2luZGV4XTsNCj4gPg0KPiA+ICAJ LyogcmVtb3ZlIHRoZSBlbnRyeSBpZiBpdCdzIGluIHRoZSBsaXN0LiAqLw0KPiA+IEBAIC00MjQs NyArNDI0LDcgQEAgaW50IGt2bV9tdHJyX2dldF9tc3Ioc3RydWN0IGt2bV92Y3B1ICp2Y3B1LCB1 MzIgbXNyLCB1NjQgKnBkYXRhKQ0KPiA+ICAJCWludCBpc19tdHJyX21hc2s7DQo+ID4NCj4gPiAg CQlpbmRleCA9IChtc3IgLSAweDIwMCkgLyAyOw0KPiA+IC0JCWlzX210cnJfbWFzayA9IG1zciAt IDB4MjAwIC0gMiAqIGluZGV4Ow0KPiA+ICsJCWlzX210cnJfbWFzayA9IChtc3IgLSAweDIwMCkg JSAyOw0KPiA+ICAJCWlmICghaXNfbXRycl9tYXNrKQ0KPiA+ICAJCQkqcGRhdGEgPSB2Y3B1LT5h cmNoLm10cnJfc3RhdGUudmFyX3Jhbmdlc1tpbmRleF0uYmFzZTsNCj4gPiAgCQllbHNlDQo+ID4N Cj4gDQo+IElmIHlvdSdyZSBnb2luZyB0byBkbyB0aGF0LCBtaWdodCBhcyB3ZWxsIHVzZSAiPj4g MSIgZm9yIGluZGV4IGluc3RlYWQNCj4gb2YgIi8gMiIsIGFuZCAibXNyICYgMSIgZm9yIGlzX210 cnJfbWFzay4NCg0KUHJvdmlkZWQgdGhlIHZhcmlhYmxlcyBhcmUgdW5zaWduZWQgaXQgbWFrZXMg bGl0dGxlIGRpZmZlcmVuY2UNCndoZXRoZXIgeW91IHVzZSAvICUgb3IgPj4gJi4NCkF0IGxlYXN0 IHdpdGggLyAlIHRoZSB0d28gdmFsdWVzIGFyZSB0aGUgc2FtZS4NCg0KCURhdmlkDQoNCi0NClJl Z2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0 b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykN Cg==