From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD114C3F2D1 for ; Fri, 6 Mar 2020 02:05:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B5D4820726 for ; Fri, 6 Mar 2020 02:05:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726563AbgCFCFo (ORCPT ); Thu, 5 Mar 2020 21:05:44 -0500 Received: from szxga03-in.huawei.com ([45.249.212.189]:2598 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726300AbgCFCFn (ORCPT ); Thu, 5 Mar 2020 21:05:43 -0500 Received: from DGGEMM402-HUB.china.huawei.com (unknown [172.30.72.53]) by Forcepoint Email with ESMTP id 1D553813662A715DAA7F; Fri, 6 Mar 2020 10:05:41 +0800 (CST) Received: from dggeme702-chm.china.huawei.com (10.1.199.98) by DGGEMM402-HUB.china.huawei.com (10.3.20.210) with Microsoft SMTP Server (TLS) id 14.3.439.0; Fri, 6 Mar 2020 10:05:40 +0800 Received: from dggeme753-chm.china.huawei.com (10.3.19.99) by dggeme702-chm.china.huawei.com (10.1.199.98) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Fri, 6 Mar 2020 10:05:40 +0800 Received: from dggeme753-chm.china.huawei.com ([10.7.64.70]) by dggeme753-chm.china.huawei.com ([10.7.64.70]) with mapi id 15.01.1713.004; Fri, 6 Mar 2020 10:05:40 +0800 From: linmiaohe To: Paolo Bonzini CC: "kvm@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "x86@kernel.org" , "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" 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: AdXzWwIZgYDieYaoSGWM6QNNY//RGA== Date: Fri, 6 Mar 2020 02:05:40 +0000 Message-ID: <82b7d2d8c75e4c80a7704ae43940392a@huawei.com> Accept-Language: en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.173.221.158] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org SGksDQpQYW9sbyBCb256aW5pIDxwYm9uemluaUByZWRoYXQuY29tPiB3cm90ZToNCj5PbiAwNS8w My8yMCAwMzo0OCwgbGlubWlhb2hlIHdyb3RlOg0KPj4gRnJvbTogTWlhb2hlIExpbiA8bGlubWlh b2hlQGh1YXdlaS5jb20+DQo+PiANCj4+IFdlIGNhbiBnZXQgaXNfbXRycl9tYXNrIGJ5IGNhbGN1 bGF0aW5nIChtc3IgLSAweDIwMCkgJSAyIGRpcmVjdGx5Lg0KPj4gIAkJaW5kZXggPSAobXNyIC0g MHgyMDApIC8gMjsNCj4+IC0JCWlzX210cnJfbWFzayA9IG1zciAtIDB4MjAwIC0gMiAqIGluZGV4 Ow0KPj4gKwkJaXNfbXRycl9tYXNrID0gKG1zciAtIDB4MjAwKSAlIDI7DQo+PiAgCQlpZiAoIWlz X210cnJfbWFzaykNCj4+ICAJCQkqcGRhdGEgPSB2Y3B1LT5hcmNoLm10cnJfc3RhdGUudmFyX3Jh bmdlc1tpbmRleF0uYmFzZTsNCj4+ICAJCWVsc2UNCj4+IA0KPg0KPklmIHlvdSdyZSBnb2luZyB0 byBkbyB0aGF0LCBtaWdodCBhcyB3ZWxsIHVzZSAiPj4gMSIgZm9yIGluZGV4IGluc3RlYWQgb2Yg Ii8gMiIsIGFuZCAibXNyICYgMSIgZm9yIGlzX210cnJfbWFzay4NCj4NCg0KTWFueSB0aGFua3Mg Zm9yIHN1Z2dlc3Rpb24uIFdoYXQgZG8geW91IG1lYW4gaXMgbGlrZSB0aGlzID8NCg0KCWluZGV4 ID0gKG1zciAtIDB4MjAwKSA+PiAxOw0KCWlzX210cnJfbWFzayA9IG1zciAmIDE7DQoNClRoYW5r cyBhZ2Fpbi4NCg==