From nobody Mon Feb 9 08:58:08 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; arc=pass (i=1 dmarc=pass fromdomain=citrix.com); dmarc=pass(p=reject dis=none) header.from=citrix.com ARC-Seal: i=2; a=rsa-sha256; t=1653053927; cv=pass; d=zohomail.com; s=zohoarc; b=FxX/2rEMTqR9ldMKcGXGQbhlKP0UjEU8+o2PITzTaA93+qh1pzTY4KwVK/QYrGDCHiYsV078VwAMB4WBoLfBFF/+FsWV6KLvLvjd5vlTUcUhUNkKrKuGMMRZxUvItaBgmQlKqomKvsh48dehdEOEtj2hWSQeEca9hE6+OLhAKek= ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1653053927; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=5AvxiNqFtJGVi/aGyaifVpzhB4RDM41TL+u3JB+MDoA=; b=lt+dU/oJg3raUJ68CnhPQb/en+9X66+HQggkkDXixQxbhYoPyPjgFrKqw3EmKVSXWf/irAu4OWnT+CaqdCSFERkiY46Nhnud65VTyDxJCq4wtv+H6dUeUuV7MVkJtZ7mjHG9NwVlJ7Hvw/7bSRIEp/W8sR05g0n1mAJlZq5aJoA= ARC-Authentication-Results: i=2; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; arc=pass (i=1 dmarc=pass fromdomain=citrix.com); dmarc=pass header.from= (p=reject dis=none) Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1653053927754128.6854234462195; Fri, 20 May 2022 06:38:47 -0700 (PDT) Received: from list by lists.xenproject.org with outflank-mailman.334161.558186 (Exim 4.92) (envelope-from ) id 1ns2pi-0006Ix-J1; Fri, 20 May 2022 13:38:22 +0000 Received: by outflank-mailman (output) from mailman id 334161.558186; Fri, 20 May 2022 13:38:22 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1ns2pi-0006Io-Eh; Fri, 20 May 2022 13:38:22 +0000 Received: by outflank-mailman (input) for mailman id 334161; Fri, 20 May 2022 13:38:21 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1ns2ph-00056k-0t for xen-devel@lists.xenproject.org; Fri, 20 May 2022 13:38:21 +0000 Received: from esa6.hc3370-68.iphmx.com (esa6.hc3370-68.iphmx.com [216.71.155.175]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id 1c2ec3d9-d842-11ec-bd2c-47488cf2e6aa; Fri, 20 May 2022 15:38:19 +0200 (CEST) Received: from mail-sn1anam02lp2049.outbound.protection.outlook.com (HELO NAM02-SN1-obe.outbound.protection.outlook.com) ([104.47.57.49]) by ob1.hc3370-68.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 20 May 2022 09:38:18 -0400 Received: from DS7PR03MB5608.namprd03.prod.outlook.com (2603:10b6:5:2c9::18) by SA2PR03MB5755.namprd03.prod.outlook.com (2603:10b6:806:111::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5273.14; Fri, 20 May 2022 13:38:17 +0000 Received: from DS7PR03MB5608.namprd03.prod.outlook.com ([fe80::5df3:95ce:4dfd:134e]) by DS7PR03MB5608.namprd03.prod.outlook.com ([fe80::5df3:95ce:4dfd:134e%5]) with mapi id 15.20.5273.018; Fri, 20 May 2022 13:38:17 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 1c2ec3d9-d842-11ec-bd2c-47488cf2e6aa DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=citrix.com; s=securemail; t=1653053899; h=from:to:cc:subject:date:message-id:in-reply-to: references:content-transfer-encoding:mime-version; bh=mMJ5P0Y1TvLI0FEIdfDVmzdQ0NnWpot2Jwnk80caOVw=; b=TwzyxQ822meB1dPOnEBWNNLqC1cDRmoQb00ddo0OtFqn6cl009I4xyyz TXwV7XKE+BnC/fwrWGl5pUT2fANFQRbq2Sa1gU+nG8EwdBSf+pIwXp+wZ 9BPj24lVpy1WmGfeq+UYMzAgrZeolvyuK6hzKY+WZZvYpXL5JeaE4sBAu E=; X-IronPort-RemoteIP: 104.47.57.49 X-IronPort-MID: 71650044 X-IronPort-Reputation: None X-IronPort-Listener: OutboundMail X-IronPort-SenderGroup: RELAY_O365 X-IronPort-MailFlowPolicy: $RELAYED IronPort-Data: A9a23:cnTWLaCEGIJYsRVW/zPiw5YqxClBgxIJ4kV8jS/XYbTApDMh3jZUm mofXWyCM6qIYmrzctx+bYm1/UwH7J+Bm9RgQQY4rX1jcSlH+JHPbTi7wuYcHM8wwunrFh8PA xA2M4GYRCwMZiaA4E/raNANlFEkvU2ybuOU5NXsZ2YgHGeIdA970Ug5w7Nj2tYx6TSEK1jlV e3a8pW31GCNg1aYAkpMg05UgEoy1BhakGpwUm0WPZinjneH/5UmJMt3yZWKB2n5WuFp8tuSH I4v+l0bElTxpH/BAvv9+lryn9ZjrrT6ZWBigVIOM0Sub4QrSoXfHc/XOdJFAXq7hQllkPhI5 tZCu4TtaTsyfYrqpPsCWgFbEhphaPguFL/veRBTsOS15mieKT7X5awrC0s7e4oF5uxwHGdCs +QCLywAZQyCgOTwx6+nTu5rhYIoK8yD0IE34yk8i22GS6t5B8ySK0nJzYYwMDMYnMdBEOyYf 8MEQTFucA7Bc1tEPVJ/5JcWw7722yGnL2EwRFS9+IYv/zDKzFNIganUCouOUPe7dP9FkRPNz o7B1yGjav0AD/SPxDzA/n+yi+vnmSLgRJlUBLC+7uRtglCY2ioUEhJ+fVmmp7+/g023WdNaI mQV/DYjqe4580nDZtrwQRy+5mKFtxg0WtxMHul84waIooLW6QuEAmkPThZadccr8sQxQFQCy Vuhj97vQzt1v9WopWm1876VqXapP3EcK2YHPXUAVVFdv4ilp5wvhBXSSNolCLSyktD+BTD3x XaNsTQ6gLIQy8UM0s1X4Gz6vt5lnbCRJiZd2+kddjvNAt9RDGJ9W7GV1A== IronPort-HdrOrdr: A9a23:iQFAAaAQkQFJylXlHeg+sceALOsnbusQ8zAXPh9KJCC9I/bzqy nxpp8mPH/P5wr5lktQ++xoX5PwO080lKQFmrX5WI3PYOCIghrNEGgP1+vfKnjbalTDH41mpN hdmtZFebrN5DFB5K6VgTVQUexQuOVvmJrY+ds2pE0dKD2CBZsQjDuQXW2gYzBLrUR9dNMEPa vZwvACiyureHwRYMj+Ln4ZX9Lbr9mOsJ79exYJCzMu9QHL1FqTmfXHOind+i1bfyJEwL8k/2 SAuwvl5p+7u/X+7hPHzWfc47lfhdOk4NpeA86njNQTN1zX+06VTbUkf4fHkCE+oemp5lpvuN 7Qoy04N8A20H/VdnHdm2qY5yDQlBIVr1Pyw16RhnXu5ebjQighNsZHjYVFNjPE9ksJprhHoe 129lPck6ASIQLLnSz76dSNfQptjFCIrX0rlvNWp2BDULEZdKRaoeUkjQ9o+a87bWPHAb0cYa lT5Jm23ocUTbraVQGVgoBX+q3jYpxpdS32AHTruaSuok1rdT5Cvg4lLfck7wY9HaIGOud5Dt v/Q9RVfcl1P6krhIJGdZA8qJiMexrwqSylChPgHX3XUIc6Blnql7nbpJ0I2cDCQu178HJ1ou WKbG9l X-IronPort-AV: E=Sophos;i="5.91,239,1647316800"; d="scan'208";a="71650044" ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=CfN++KibEMnFvXHBmIXaZjynOtUN9kr4tnEnRTXVcv25PFB/HQreWA731QtN9DhQZYIp+bCTnI9XGy+IioLLI4teAFNutf0z3X4YZqbxIWMK6l65p7OiYrnOlSRUTp4+oXpIcm2XT7eq7fN+0t7aqrpPoyOuLxnR6pdRNq0GVoL0vJMhsbVjTZ1Mn6Irspx5jfrhr8hxkj6NpfEZbRhjfXdoJXYisP4DffaKgmxuUgCGUYA3qUlZ02XM5wVWFsXTv8jh02Dp89jXMvA1MPjvrBBU16CrS2AUi0PkL5UGuPnqbL/r3i8ZL1PFd0A4AYIK4sM0SF5wMBjHX6N0128tZw== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=5AvxiNqFtJGVi/aGyaifVpzhB4RDM41TL+u3JB+MDoA=; b=G5M3pVPfsmoUU2bhBauUMGyO+axgHBYoVR8lT7ZFkoaG+ApSlcnqsHiUhRQugj92XjxuT/6Yt8UC9Y3BOg26SA6JL5NlfkjLZaALHXh0AcxC/yMm1FhaL3pUPo8kjnN8sEYjonjfaAl9SBWvkC2bY3sF70E4JEIL+PiyWT4X8ao8hGUBZKSdtn8Hl+znTDUdBi/x3ilhXebMh7KWB9CL6cJT3sUYv15AIzpvIVoD3n7I1twBm3NeK1egD9ck5hzFjIknt7Xr6YI4ayFUTIGBdt5nUeAUCj7wBt68vHdgy4kr02s5TPJFOPgso2ruy+HWPxwjZ0R7OqgatQ5+XrV+Ig== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=citrix.com; dmarc=pass action=none header.from=citrix.com; dkim=pass header.d=citrix.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=citrix.onmicrosoft.com; s=selector2-citrix-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=5AvxiNqFtJGVi/aGyaifVpzhB4RDM41TL+u3JB+MDoA=; b=o6QCtwVm5cNssF8DWwSHdTTpZVDl169pwpSXk8t+hG3vRvJjD/jj3jx13BS6HzBTojU6y2Nq4eMXkLdOEo+JbVGgIgXqkZUosvbVQ8HQ7L+Trbi2eqZK4Q1HaTk+P9s84uOg02URy+37muPoS0H355zgq+wD/HeorRy1Rev+kIk= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=citrix.com; From: Roger Pau Monne To: xen-devel@lists.xenproject.org Cc: Roger Pau Monne , Jun Nakajima , Kevin Tian , Jan Beulich , Andrew Cooper , Wei Liu Subject: [PATCH 4/5] x86/vmx: handle no model-specific LBR presence Date: Fri, 20 May 2022 15:37:45 +0200 Message-Id: <20220520133746.66142-5-roger.pau@citrix.com> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220520133746.66142-1-roger.pau@citrix.com> References: <20220520133746.66142-1-roger.pau@citrix.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: LO4P265CA0078.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:2bd::7) To DS7PR03MB5608.namprd03.prod.outlook.com (2603:10b6:5:2c9::18) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: f2f8db8a-813f-4da4-458a-08da3a65fef6 X-MS-TrafficTypeDiagnostic: SA2PR03MB5755:EE_ X-LD-Processed: 335836de-42ef-43a2-b145-348c2ee9ca5b,ExtAddr X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 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:DS7PR03MB5608.namprd03.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230001)(4636009)(366004)(54906003)(316002)(6916009)(86362001)(66556008)(66476007)(66946007)(8676002)(4326008)(6486002)(83380400001)(6512007)(26005)(2906002)(6506007)(508600001)(1076003)(38100700002)(2616005)(82960400001)(6666004)(36756003)(5660300002)(8936002)(186003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?cVJYM2NEL3JGOVh2aUVRZWp5TG5ERDB5ZVFzRlJta0t3UGFPWjdKQ2tWZVJz?= =?utf-8?B?RG9qZitzNytiMkVNbWNUb2REdHh4cXg1SmFOL0IzeTkzZW81dzMvbUNzV1Zq?= =?utf-8?B?RTRha3BtUjFWb3R3ZjJucEMrMG9tMUdPcGtJTkVlbEVDd3JwL2Q4cExTMVly?= =?utf-8?B?RmZKNFdYL0pqTVR6ZVZLejQycmhFSkFRQVQybFppRTZWMDI3amtlOEtvclRo?= =?utf-8?B?SkNLRmVtT0ZtMjNYRmdnblZXb2lNLzdJTkVxVVZZZGFsMUc1UklkMVhPVWc2?= =?utf-8?B?MjhMZzFNcWNHNmRCeEsxMGdoOXh6OGpYYkdXTk1zMWNBaEZxbitNUW83UkVD?= =?utf-8?B?blFHRlZTalJ2TEdGaUFZRDdNVy8wbEp3KzhZTUM0RnR1VUt3WDRDbHA0aHY1?= =?utf-8?B?OUZDZlVEbTAxaVhEZUdYMW50djNvQnU5bFprR0FQYm9jNTJkOVFLN0NrVEg5?= =?utf-8?B?YkllNTlRWG52YWxoT1dCRUVOQXE4Zm9zMXNrRHFkSDhZWkNjWGQ2a1N6c0xM?= =?utf-8?B?M3NCWjJsRTVhNVpMVHZQTHE5L3diUjBKOTdrUjJORFhSYkJRTmx5Nnh4K0Uv?= =?utf-8?B?NDVlQXVJVkNJeW1sT0pMNEpPSE41dklSYmhEa2lSMk1PM0xZYUdUaWdCMUNU?= =?utf-8?B?M0R6UkJmU0pFZ2hrTm9Fdm40ZENvOFI1c1N5TXkwWExlQ0JjbDBGUUhvYkFC?= =?utf-8?B?ZWhXQSsrZVRBNnlYMjArQmNOZFdRUkg2ZVpOamdVNUZMaTVwU1hFN1BMdjFk?= =?utf-8?B?SnRZWitCdjFXcDhMMkt1STE4MkVPL2hkRUxycmJ6RUlYTnhPNnBGQlVITUJV?= =?utf-8?B?WmFsVFVFb0N2UFhUUDRaQ1ptU3dUNW9rVzN2ZS9FMC9rTnl2VzU2RitxcnRi?= =?utf-8?B?WHdUWVdaSFhaSlFjTThsM3BtNG1BaWNIQTUyMnhOQUcwTUZqVi9JT214OXRB?= =?utf-8?B?TERBbzFxRDlFWlRURGhXUUw2YThTS1BMVzd5N0Z3aWNkTXNRU3YxeG1lbDZu?= =?utf-8?B?ekcwOHRzeFNpY1htelpBeHQ3Z2pnMEdxSVRsUWx5VVF6Wmg2cFdNOVFGUFdF?= =?utf-8?B?ZEpxUmVDVFI3bzVxWkZtSVlhNkMwN204SW81YTZ2UU9rUEZ0eWI0RFRYWDVV?= =?utf-8?B?ZldJQVArRVFmVVBVdHpUYVB6bjRrVjZTSXFacTU2eEZLSS80b2pyWUpvNFpX?= =?utf-8?B?QTR1N3BSMmJZMGI4QXVBSnp1a3Z1VTRra01qMHl3T2ZBb2tMVWU2M0ZYcDJE?= =?utf-8?B?TXUrbjN2VktCanlNRFZpRUJvOFQzL3l2MU9mV1BQR3ZyMzA3T3lXUkw0WjA2?= =?utf-8?B?b0hEQUVXd3BYZTl3YURVNnF0VTJXS0tKVkZhL25na3h6RWlCcEpNZHQ3QVVJ?= =?utf-8?B?eWIrUTVzUWxlbktXK3VkamZEUWxaSFdGdkpnVXBobllYUDRndDc0bSsrQUEz?= =?utf-8?B?TEgvejV1S2UzWW9UNlZzdENSNGZQT0VuR3pjelMwa3BtUXZuVW5rMkZSR1NK?= =?utf-8?B?SWxJdmpPNzJkYVlidkszcnJDaENQdnhPakdZeWNtOFUzU29waWlvSHdNT0xL?= =?utf-8?B?aXFhZjdtUituQjBQN0IxRjhnUW5TcjlCVG1oL3hERkQ4VElicjQ4bDYvRlR1?= =?utf-8?B?K2hCTkxJOUpEYVlZdDZXejk3TWt6bDNobCt4cjVGckNzaEVvT0R1SFdwSVlq?= =?utf-8?B?cTZja0VYTE93ZU4xZW9xaHNIL3FBamJ2cGVEdzRoc2dlVUhOeHhyWU9aZXpV?= =?utf-8?B?VkgrWVU1RkRLTUt3Y1BTRldnSE5wNEZEOEptRHRwU2IxSFVuUzFSWFEwOXpJ?= =?utf-8?B?enR0MlY0TWdiSWRXbFdBTDIwRGYvQmFFUHg2eUtRRGphRDB0Vmk2SStPQmJ4?= =?utf-8?B?U0xZMkpEU1dEWmwzYmtueUpiZzZUbkgwRlQ2dCswOVpkWUJ2QUpXdWtsa2dO?= =?utf-8?B?bDNVcWhaWnRtUGZucmYvTW94c3A4ZGRHOXk4TjJUZm9wcHZrRHBZR2RxaXV4?= =?utf-8?B?bVN4Y1JRdTlYMDNWYnlsdGNSajhLTXFxN2xLWG51S2lKSC9TcnR0aW1qWkM4?= =?utf-8?B?dzZOUVVLOFpPb2JZaUs2b21XYjdaTS9rWElzRWg4dU1EdmduMUVJL1dQVnU4?= =?utf-8?B?UXI0MUNBNXFlTVYzZVlDWkdNRHIwU2hjL0Q5NHJ2SUdKNHAwbjJ3cUJadlhI?= =?utf-8?B?SVJ5OWVZZ2VXNDRLM2xKbW5mVk5iaFplc0llTGlOVC9MODcvODQ0UFRORjFG?= =?utf-8?B?KzJEYTFRTmpzUnJmQmlURFJGREZJeXJTMnU0bElIN092RGF1Y0ZmV3hCS2RV?= =?utf-8?B?N20yQ3IvWEhuUjFRTDZrS3dKS05ubGJrZ1lLV2FPVDZyUW15VE5RNTk1YVpt?= =?utf-8?Q?QVgJAVCNMmtNfsrQ=3D?= X-OriginatorOrg: citrix.com X-MS-Exchange-CrossTenant-Network-Message-Id: f2f8db8a-813f-4da4-458a-08da3a65fef6 X-MS-Exchange-CrossTenant-AuthSource: DS7PR03MB5608.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 May 2022 13:38:17.3924 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 335836de-42ef-43a2-b145-348c2ee9ca5b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: FCSmLOWkXo+LoC1wmktdundXOUZXBraRlZMD7/UYlIj5YNEHcjKltmcuuCtzrexF2T8udfqwqZxw/WtKHHU/kw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA2PR03MB5755 X-ZohoMail-DKIM: pass (identity @citrix.com) X-ZM-MESSAGEID: 1653053929970100001 Sapphire Rapids have no model-specific LBRs, and instead only expose architectural LBRs. As documented in the Architectural Last Branch Records specification, processors not supporting model-specific LBRs MSR_IA32_DEBUGCTLMSR.LBR has no meaning, and can be written to 0 or 1, but reads will always return 0. Implement support in vmx_msr_write_intercept() by adding generic detection of lack of model-specific LBRs by checking if the LBR format reported in PERF_CAPABILITIES matches 0x3f, which is explicitly listed in the manual as a way to signal lack of model-specific LBRs presence. Signed-off-by: Roger Pau Monn=C3=A9 --- Note the indentation change in vmx_msr_write_intercept() as a result of the addition of a new condition is left for a following patch in order to aid readability of the change. --- xen/arch/x86/hvm/vmx/vmx.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c index cf428a4849..3f45ac05c6 100644 --- a/xen/arch/x86/hvm/vmx/vmx.c +++ b/xen/arch/x86/hvm/vmx/vmx.c @@ -3007,6 +3007,8 @@ static const struct lbr_info { { MSR_GM_LASTBRANCH_0_FROM_IP, NUM_MSR_GM_LASTBRANCH_FROM_TO }, { MSR_GM_LASTBRANCH_0_TO_IP, NUM_MSR_GM_LASTBRANCH_FROM_TO }, { 0, 0 } +}, no_lbr[] =3D { + {0, 0} }; =20 static const struct lbr_info *last_branch_msr_get(void) @@ -3070,6 +3072,21 @@ static const struct lbr_info *last_branch_msr_get(vo= id) /* Goldmont */ case 0x5c: case 0x5f: return gm_lbr; + + default: + if ( cpu_has_pdcm ) + { + uint64_t cap; + + rdmsrl(MSR_IA32_PERF_CAPABILITIES, cap); + if ( (cap & MSR_IA32_PERF_CAP_LBR_FORMAT) =3D=3D 0x3f ) + /* + * On processors that do not support model-specific LB= Rs, + * PERF_CAPABILITIES.LBR_FMT will have the value 0x3f. + */ + return no_lbr; + } + break; } break; =20 @@ -3521,6 +3538,8 @@ static int cf_check vmx_msr_write_intercept( return X86EMUL_OKAY; } =20 + if ( lbr->count ) + { for ( ; lbr->count; lbr++ ) { unsigned int i; @@ -3546,6 +3565,10 @@ static int cf_check vmx_msr_write_intercept( v->arch.hvm.vmx.lbr_flags |=3D LBR_FIXUP_TSX; if ( ler_to_fixup_needed ) v->arch.hvm.vmx.lbr_flags |=3D LBR_FIXUP_LER_TO; + } + else + /* No model specific LBRs, ignore DEBUGCTLMSR.LBR. */ + msr_content &=3D ~IA32_DEBUGCTLMSR_LBR; } =20 __vmwrite(GUEST_IA32_DEBUGCTL, msr_content); --=20 2.36.0