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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 4EAC0C48BDF for ; Tue, 15 Jun 2021 12:20:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1B14C61462 for ; Tue, 15 Jun 2021 12:20:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230052AbhFOMW0 (ORCPT ); Tue, 15 Jun 2021 08:22:26 -0400 Received: from smtprelay-out1.synopsys.com ([149.117.87.133]:54984 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229601AbhFOMWZ (ORCPT ); Tue, 15 Jun 2021 08:22:25 -0400 Received: from mailhost.synopsys.com (sv2-mailhost2.synopsys.com [10.205.2.134]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client CN "mailhost.synopsys.com", Issuer "SNPSica2" (verified OK)) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id 6638EC0447 for ; Tue, 15 Jun 2021 12:20:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1623759621; bh=WhjIYtBFuo3qecxYkuUjgoyOfduF98ZA23TuKwZAO9w=; h=From:To:Subject:Date:References:In-Reply-To:From; b=bn6y55HmwPftBk8+I6h2lzWVUX4o1bf9wHzvmJ01STStnb9GEZXIRRjCN04xD16Cn BnqFEhLKVLwtPNrfmvXHsgFWCWuG3YfzwofBXiEcfIvPE5bNJ8OIAzfCNxzBGCA+M7 7XP7jDTYC/9zjGQ74a3Hn/PHCaQiT8aDoLTdy66E/se29HEfqJ7GSTZw9OJiuINKHT WhugqsLGIUcPZU0OyQnrosGZK9xEQ04K1psq2p5isyyM+QaEq2MsfYU3Z9OeIVmHhK Aq+ydylBByJsvWdBXctKVTAOxCOGZ1swtVfAPzwXLXA36LnAuszNbt0nml8OBpBvB4 iL3jmpr8xUXRQ== Received: from o365relay-in.synopsys.com (sv2-o365relay3.synopsys.com [10.202.1.139]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client CN "o365relay-in.synopsys.com", Issuer "Entrust Certification Authority - L1K" (verified OK)) by mailhost.synopsys.com (Postfix) with ESMTPS id 2A229A0096 for ; Tue, 15 Jun 2021 12:20:21 +0000 (UTC) Received: from NAM10-DM6-obe.outbound.protection.outlook.com (mail-dm6nam10lp2105.outbound.protection.outlook.com [104.47.58.105]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail.protection.outlook.com", Issuer "DigiCert Cloud Services CA-1" (verified OK)) by o365relay-in.synopsys.com (Postfix) with ESMTPS id ED7D54019C for ; Tue, 15 Jun 2021 12:20:20 +0000 (UTC) Authentication-Results: o365relay-in.synopsys.com; dmarc=pass (p=reject dis=none) header.from=synopsys.com Authentication-Results: o365relay-in.synopsys.com; spf=pass smtp.mailfrom=tobies@synopsys.com Authentication-Results: o365relay-in.synopsys.com; dkim=pass (1024-bit key; unprotected) header.d=synopsys.com header.i=@synopsys.com header.b="TGvfM0jI"; dkim-atps=neutral ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=TqfcC5BeO7Ie4PUYMDxHbtjKmvOtnIrDLfX0iY7D0mrraHt27GW6QRkS7U7hKHgCzD43U44glZKxa6dRu/bRfHVvkjkCS8sBc8RkEd1rkyGQ2Ao4nrfhUJGZ6fvdxJ7mMtxqSk3ZZkOAnBe6kg74r5IPhpxo06mVnAc+mSKNZ2uzgR/36bx3DS9cDTjhZaygXRszgeacaGFO7ENW1pCVlkcepGYNL8+8bVQ6Lrx4fQ7MzCXvVMMEh6oxylj2ZG1HLIFPqwiG+IurKxh9/cb4b3vOwhRIFKEX0wWutxXbX3iE82WwHj8P07/0KtVmnU+eJgG/WnXgs/YX0qMjIAPcMQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=WhjIYtBFuo3qecxYkuUjgoyOfduF98ZA23TuKwZAO9w=; b=LtqHBmXS1tbxDwC9Ahq1qP+belA+CfB/Csf5RGX8aD8E9zK4Ky2dPckIdWKK76zat2YwYuGVUv9yXwegKgrT956QAL2cS7OQEo2H8NgtJMqGoRhlTHX2gyB+5GyBHtBL3fF3j3517sLtw0Bo3uH4F+3O5kRJMlEhP4KEg1946FUJKOFUAGQk6a8XsnVTWYJP/zHrP+dRGuDZ/nsfDS7wWMHuj+zD3/EHXnYev7ND1UNCZzgU+TkxsLvhqh/zCGfoMp9mhomKsSsuR7iBIbwGNZ0FOkA2prnYkoqGHmGvIwPryFZC3UqAN8VJor+nRWUcLYNSi/CRFi3cowxycukiUg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=synopsys.com; dmarc=pass action=none header.from=synopsys.com; dkim=pass header.d=synopsys.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=synopsys.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=WhjIYtBFuo3qecxYkuUjgoyOfduF98ZA23TuKwZAO9w=; b=TGvfM0jIB+FXtlo8t0zcuGF6YZA+rbH1HRFyLaVYuMgOXBUY6XIyxzxFwZFfTxjI1xO1bVuCbQcsv/JLeWI0lvUNbQVwP3w8h5BzIDAERv3UyW+K0PlQRYupEessl1QpsLkWS9pLhugcwkQ6A44yU1cCg1T+0Ym/gz4b2ejLLEA= Received: from DM4PR12MB5264.namprd12.prod.outlook.com (2603:10b6:5:39c::17) by DM4PR12MB5325.namprd12.prod.outlook.com (2603:10b6:5:39e::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4219.22; Tue, 15 Jun 2021 12:20:19 +0000 Received: from DM4PR12MB5264.namprd12.prod.outlook.com ([fe80::a049:643e:9e31:6029]) by DM4PR12MB5264.namprd12.prod.outlook.com ([fe80::a049:643e:9e31:6029%6]) with mapi id 15.20.4219.025; Tue, 15 Jun 2021 12:20:19 +0000 X-SNPS-Relay: synopsys.com From: Stephan Tobies To: "kvm@vger.kernel.org" Subject: Controlling the guest TSC on x86 Thread-Topic: Controlling the guest TSC on x86 Thread-Index: Addh3tMY90dh+2TRQ4S6UC1dbuh2PgAAcnNg Date: Tue, 15 Jun 2021 12:20:19 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-dg-rorf: true x-dg-ref: =?us-ascii?Q?PG1ldGE+PGF0IG5tPSJib2R5LnR4dCIgcD0iYzpcdXNlcnNcdG9iaWVzXGFw?= =?us-ascii?Q?cGRhdGFccm9hbWluZ1wwOWQ4NDliNi0zMmQzLTRhNDAtODVlZS02Yjg0YmEy?= =?us-ascii?Q?OWUzNWJcbXNnc1xtc2ctMGFlNDAxNjAtY2RkNC0xMWViLWFlMzktY2MyZjcx?= =?us-ascii?Q?YzBjNjZkXGFtZS10ZXN0XDBhZTQwMTYyLWNkZDQtMTFlYi1hZTM5LWNjMmY3?= =?us-ascii?Q?MWMwYzY2ZGJvZHkudHh0IiBzej0iMTExOSIgdD0iMTMyNjgyMzMyMTc0NjY5?= =?us-ascii?Q?OTM1IiBoPSJBV3AzRXdQbzczTUJEZWM3cmlLY0V3MHNhL2M9IiBpZD0iIiBi?= =?us-ascii?Q?bD0iMCIgYm89IjEiIGNpPSJjQUFBQUVSSFUxUlNSVUZOQ2dVQUFIWUlBQUJ2?= =?us-ascii?Q?MkQzTjRHSFhBVGdjdDNOY3Yxa3RPQnkzYzF5L1dTME5BQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBSEFBQUFBR0NBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?RUFBUUFCQUFBQVlpcS8wQUFBQUFBQUFBQUFBQUFBQUo0QUFBQm1BR2tBYmdC?= =?us-ascii?Q?aEFHNEFZd0JsQUY4QWNBQnNBR0VBYmdCdUFHa0FiZ0JuQUY4QWR3QmhBSFFB?= =?us-ascii?Q?WlFCeUFHMEFZUUJ5QUdzQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFF?= =?us-ascii?Q?QUFBQUFBQUFBQWdBQUFBQUFuZ0FBQUdZQWJ3QjFBRzRBWkFCeUFIa0FYd0J3?= =?us-ascii?Q?QUdFQWNnQjBBRzRBWlFCeUFITUFYd0JuQUdZQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBUUFBQUFBQUFBQUNBQUFB?= =?us-ascii?Q?QUFDZUFBQUFaZ0J2QUhVQWJnQmtBSElBZVFCZkFIQUFZUUJ5QUhRQWJnQmxB?= =?us-ascii?Q?SElBY3dCZkFITUFZUUJ0QUhNQWRRQnVBR2NBWHdCakFHOEFiZ0JtQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQkFBQUFBQUFBQUFJQUFBQUFBSjRBQUFCbUFHOEFk?= =?us-ascii?Q?UUJ1QUdRQWNnQjVBRjhBY0FCaEFISUFkQUJ1QUdVQWNnQnpBRjhBY3dCdEFH?= =?us-ascii?Q?a0FZd0FBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUVBQUFBQUFBQUFBZ0FBQUFBQW5nQUFBR1lBYndCMUFHNEFaQUJ5QUhrQVh3?= =?us-ascii?Q?QndBR0VBY2dCMEFHNEFaUUJ5QUhNQVh3QnpBSFFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFRQUFBQUFBQUFBQ0FB?= =?us-ascii?Q?QUFBQUNlQUFBQVpnQnZBSFVBYmdCa0FISUFlUUJmQUhBQVlRQnlBSFFBYmdC?= =?us-ascii?Q?bEFISUFjd0JmQUhRQWN3QnRBR01BQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFCQUFBQUFBQUFBQUlBQUFBQUFKNEFBQUJtQUc4?= =?us-ascii?Q?QWRRQnVBR1FBY2dCNUFGOEFjQUJoQUhJQWRBQnVBR1VBY2dCekFGOEFkUUJ0?= =?us-ascii?Q?QUdNQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBRUFBQUFBQUFBQUFnQUFBQUFBbmdBQUFHY0FkQUJ6QUY4QWNBQnlBRzhB?= =?us-ascii?Q?WkFCMUFHTUFkQUJmQUhRQWNnQmhBR2tBYmdCcEFHNEFad0FBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQVFBQUFBQUFBQUFD?= =?us-ascii?Q?QUFBQUFBQ2VBQUFBY3dCaEFHd0FaUUJ6QUY4QVlRQmpBR01BYndCMUFHNEFk?= =?us-ascii?Q?QUJmQUhBQWJBQmhBRzRBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUJBQUFBQUFBQUFBSUFBQUFBQUo0QUFBQnpB?= =?us-ascii?Q?R0VBYkFCbEFITUFYd0J4QUhVQWJ3QjBBR1VBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFFQUFBQUFBQUFBQWdBQUFBQUFuZ0FBQUhNQWJnQndBSE1BWHdCc0FH?= =?us-ascii?Q?a0FZd0JsQUc0QWN3QmxBRjhBZEFCbEFISUFiUUJmQURFQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBUUFBQUFBQUFB?= =?us-ascii?Q?QUNBQUFBQUFDZUFBQUFjd0J1QUhBQWN3QmZBR3dBYVFCakFHVUFiZ0J6QUdV?= =?us-ascii?Q?QVh3QjBBR1VBY2dCdEFGOEFjd0IwQUhVQVpBQmxBRzRBZEFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQkFBQUFBQUFBQUFJQUFBQUFBSjRBQUFC?= =?us-ascii?Q?MkFHY0FYd0JyQUdVQWVRQjNBRzhBY2dCa0FBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFB?= =?us-ascii?Q?QUFBQUFBQUVBQUFBQUFBQUFBZ0FBQUFBQSIvPjwvbWV0YT4=3D?= authentication-results: vger.kernel.org; dkim=none (message not signed) header.d=none;vger.kernel.org; dmarc=none action=none header.from=synopsys.com; x-originating-ip: [84.140.66.92] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: f7765a81-8018-47de-ae46-08d92ff7f0d4 x-ms-traffictypediagnostic: DM4PR12MB5325: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:10000; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM4PR12MB5264.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(396003)(376002)(366004)(39860400002)(136003)(346002)(86362001)(478600001)(316002)(8936002)(6916009)(76116006)(52536014)(7696005)(33656002)(66946007)(66446008)(64756008)(66556008)(66476007)(8676002)(9686003)(2906002)(71200400001)(186003)(6506007)(122000001)(55016002)(26005)(2940100002)(38100700002)(5660300002);DIR:OUT;SFP:1102; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?us-ascii?Q?Y9jPsUC4MlJKnJbv97vdAjnT5bqIHi14DZS08u24DYOsEX37u998PRYCLT3o?= =?us-ascii?Q?Y5EXiqrTkZ0CJU6BU6rJ2NrPObhUxM1sSvnTne8nHHT7/yjXZx1RvP6gLt86?= =?us-ascii?Q?RLmU0dUFK/CqagODNK93sjcoyAZLpDABZvvi6p7IUhk+ZclOi1N29HRIH2hG?= =?us-ascii?Q?G7H5hqh9rZ90KRlWCvC07vSSiDU5sRWvwqQwbixjbC7x6E8ZJfh2WUHVZrxD?= =?us-ascii?Q?b2uY9kot0Tj2XztwPCQ4aB6ntOllqx3S6bQVdz2qeedpfd8GJCTOGPQC4Cxe?= =?us-ascii?Q?hzFKGFE9SNqK3qEmhRdto1zYBifMNVfkBnbm55ZJ1P+gHoRROl+QSX9HcT3P?= =?us-ascii?Q?G6eEpRolgW4KDeRd2o830kAn1VxK1H/U/genOrpcQw480ZtCxH0Cv7z89oAT?= =?us-ascii?Q?x0o4BxbgmT39dU5ihYfDFj/oBWqaMgqyeSQZCcQOpXHVmuRU+eHCHqxL77MM?= =?us-ascii?Q?jmnkeq/H42ujO5FyxvKxiqGy1dKm3zIIaxFdymGv6THwvG2s5WHl/3heiqRV?= =?us-ascii?Q?mhmLjG28PdXAtLCBsOxInmtMzjdddZKHe0vcUMHmoLYiySkxRthBMgAzZKwU?= =?us-ascii?Q?3ifJ40e1f05verKS4rMB0zqYUP8pnKGC4WndLLHKyE0OIcQI6tUZ97sNdEZP?= =?us-ascii?Q?v6zbf5gB9HNRcNkP7/Z8rxvRPc+scesr9wfqoEFpKY3dbzqZwadDqPr084bM?= =?us-ascii?Q?h7hlWFl8G8XYnWccMC+zwQ4diTlkFG9Gkdr8IdEhojY1+zbI8MJ8pB6L71TA?= =?us-ascii?Q?JbBOa+fFOrKZANj6NAEW/K55n3qk3tWTVl6ToRbTdV8lRvV94Bd1ab45cE8l?= =?us-ascii?Q?xjoORa/tGSLw+OCDkcg1ko2UweD5e35DQna6XX8Pg1BmVr3TItgyoGjLuzuM?= =?us-ascii?Q?LxdLlGvYgHlQmVM1m39cblYLyEgdV5sXhaKMeifwAD4wZpfpCqcryRyc2SAF?= =?us-ascii?Q?Zung7LzgeAru20sG24nxqkSb4OFUOx0s7bKW4uqpfVL3W3A/UaWiSg4hGS78?= =?us-ascii?Q?GeBU8352hCVTZxotyQeWK0KuOZhOnzz2h9dx7dcFcBIVmxiLKqR7zg8YLJGx?= =?us-ascii?Q?kRjhxjkBJEYTj6T5MtcuzRorOaMB+DHP7bR/ja2H32NILA7omC+kQI2gReKR?= =?us-ascii?Q?qC0q7kuWO/J23K2Pa61hUDN0fSrJ/EF1suV/FrzM555KlmrP8cte8djpAtJU?= =?us-ascii?Q?4BKjCBiKg2KR9Ndueee5N943OLMhWKAwV2tgTxdLns8GkMLEiyvySmnY8eiH?= =?us-ascii?Q?DweXIxCIraw9T5G3NHfQT7v0B5Xew5r+jz7hAb5FB5zqSqV0x2p+huNsI4jK?= =?us-ascii?Q?lao=3D?= x-ms-exchange-transport-forked: True Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: synopsys.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM4PR12MB5264.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: f7765a81-8018-47de-ae46-08d92ff7f0d4 X-MS-Exchange-CrossTenant-originalarrivaltime: 15 Jun 2021 12:20:19.3135 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: c33c9f88-1eb7-4099-9700-16013fd9e8aa X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: Osmv4e/CXxAwu2DI5ZUNvuzsEhYP0+GHYNBbGyBqbSYIxjVel4hsn+n6v7zlpwiXFb9cnZk1LakZTQRJIxtoHQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB5325 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Good afternoon! We are looking at the use of KVM on x86 to emulate an x86 processor in a Vi= rtual Prototyping/SystemC context. The requirements are such that the guest= OS should be ideally run unmodified (i.e., in this case ideally without an= y drivers that know and exploit the fact that the guest is not running on r= eal HW but as a KVM guest).=20 For this, we also would like to control the TSC (as observed by the guest v= ia rdtsc and related instructions) in such a way that time is apparently st= opped whenever the guest is not actively executing in KVM_RUN. I must admit that I am confused by the multitude of mechanism and MSRs that= are available in this context. So, how would one best achieve to (approxim= ately) stop the increment of the TSC when the guest is not running. If this= is important, we are also not using the in-chip APIC but are using our own= SystemC models. Also, are there extra considerations when running multiple= virtual processors? Any pointers would be greatly appreciated! Thanks and best regards Stephan Tobies