From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7171C2C0292; Mon, 15 Sep 2025 08:23:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=192.198.163.15 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757924595; cv=fail; b=GZsNoN/4uGhb1+MqCVYqvy/xpVeWqCIt2CNZXnWT2pvu+dsRYEm4KCQkGQiy/TlhXfghzkkumZZvHNwEtppNYpAFJD4OSwOSHeueFSqBlT8UGAjD24Zv0wfM6qrwXjkFdYX1TEZXFg+cWcfKq8OxS0pfNOAMTDvgh3ZsTB+3m2E= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757924595; c=relaxed/simple; bh=PF2F+1bMq+UkBjLtOlOzpaoduwJ3DYZ8pajfgRS0/MQ=; h=Date:From:To:CC:Subject:Message-ID:References:Content-Type: Content-Disposition:In-Reply-To:MIME-Version; b=knLtxi6c0T5C6HDOZX049OlRAY477JdxqGVzpl0hADElusWKc+wP64BS/SHtlK3tHfUalKx+jEHcuUfqhFu/ckifoYc9JB1dTrWNZjBqYkpvi63vktbCtZj01Re7TNNNy7872a/c29TDZ4NCfE9x4GHrSmPDOPwRj1JraopI6Jc= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=ZULFjVjK; arc=fail smtp.client-ip=192.198.163.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="ZULFjVjK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1757924593; x=1789460593; h=date:from:to:cc:subject:message-id:references: in-reply-to:mime-version; bh=PF2F+1bMq+UkBjLtOlOzpaoduwJ3DYZ8pajfgRS0/MQ=; b=ZULFjVjK16swhvhjDia4qMurAxwIhoFbBN9L9N8jtd17JtauHQaFnOIn g8OhDl5ioBnZeSx4YF59GCvLs0Q/1EY2l4wBu81T7D5NdZG1MqYApeGbe AatPGWIz82FqBSOG5SqyBheJyJXXqA5Ze0McLkl1tSNmm58Cme0PMkzmu z95cTm7kDYnzK+cdvJnm0N5O9Jaa+rQ/R4oNEEBGrmP+2AsHhfIVKo7M2 TpXNl5ov889cbZ4kJ2hGlsMxpsjCINbU83AM+JK68WiwhfOFr3f+QK44d WABRkSI+9vEBDh0kztmtw6yDp6Tn85V15H5uOf2h36CgXIeJSwro+Tk+d Q==; X-CSE-ConnectionGUID: 5tiFo6eMQIymWVWLceNxRg== X-CSE-MsgGUID: 8y02DdVTRuqqRippEpqflw== X-IronPort-AV: E=McAfee;i="6800,10657,11553"; a="60275456" X-IronPort-AV: E=Sophos;i="6.18,265,1751266800"; d="scan'208";a="60275456" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Sep 2025 01:23:12 -0700 X-CSE-ConnectionGUID: ZhuMluHnSMuU9n5AEuA1Zg== X-CSE-MsgGUID: vwjbANVsQHaxKxFCcPSkrQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.18,265,1751266800"; d="scan'208";a="179726685" Received: from fmsmsx902.amr.corp.intel.com ([10.18.126.91]) by orviesa005.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Sep 2025 01:23:12 -0700 Received: from FMSMSX901.amr.corp.intel.com (10.18.126.90) by fmsmsx902.amr.corp.intel.com (10.18.126.91) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Mon, 15 Sep 2025 01:23:10 -0700 Received: from fmsedg902.ED.cps.intel.com (10.1.192.144) by FMSMSX901.amr.corp.intel.com (10.18.126.90) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17 via Frontend Transport; Mon, 15 Sep 2025 01:23:10 -0700 Received: from NAM11-CO1-obe.outbound.protection.outlook.com (40.107.220.81) by edgegateway.intel.com (192.55.55.82) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Mon, 15 Sep 2025 01:23:09 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=KuB71Z14PDOpP1JK3gCQjqXTMANMpnu+ZW5OlhjLo70RK9yAA/KE4ENdodonIPcrunMSQEopC9lEYpaCj/cw1dtO8GE0s32UEREy19sN58Li66aMJ2hWNpukyL16e7A3cWj3lk8Ni03rmwZQJ+sQ2D0nQscGlhGkYewTGKcSwmpFKWWSlwM1HHcvASK7L9ZKy3FoNdQVoxknTrxQLrO9re8sjOAraIiGHuhngSEAaQp5aIL6uWAri0xGlN6C0gP0ksl2VUvvOAbU9Qcwgof79zGAWMAFoQMvZv7a3resVsnwdbZWN+TmqqWxHbyLEHNCSmxQw1+wUB/jVasmV+6dpg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; 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=rBMu6ryT7saUi8GY8Mw9/xkFkVGZdrVW3ZSepn1UpfI=; b=IZ9WmFTBLMgWXjiAkAifA/uxZR3g39q/vq3sC8vT/ebk1hjXFaCthCk8jtuDABW/7sEhM0cUzkTAqqnIAkHnbR5zA3EzhOzySNaznoLFOOhC+1ldioJdk436J9pVZ13xFOs/nNpX//RlekGWVQ7qcBQ9HlZF0aH37E54D11dD5ICOwQDhesV8d4AOtU8VYm+ryekOGP2ObxAm05b5uxi7z/EBuhlxpHnkmdpkWfz3puQUtmLin7WG+CelE42XeuVi08RyLIEVlzIt64ZEhml6ZdB2FthZfeq2pvonI2lVoe/aYDY5IPINeetHSjRcHu2xw26RozFbSIQmMWXIBjrcQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=intel.com; Received: from CH3PR11MB8660.namprd11.prod.outlook.com (2603:10b6:610:1ce::13) by DS7PR11MB8853.namprd11.prod.outlook.com (2603:10b6:8:255::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9115.19; Mon, 15 Sep 2025 08:23:07 +0000 Received: from CH3PR11MB8660.namprd11.prod.outlook.com ([fe80::cfad:add4:daad:fb9b]) by CH3PR11MB8660.namprd11.prod.outlook.com ([fe80::cfad:add4:daad:fb9b%4]) with mapi id 15.20.9115.017; Mon, 15 Sep 2025 08:23:07 +0000 Date: Mon, 15 Sep 2025 16:22:56 +0800 From: Chao Gao To: Sean Christopherson CC: Paolo Bonzini , , , Tom Lendacky , Mathias Krause , John Allen , Rick Edgecombe , Maxim Levitsky , Xiaoyao Li , Zhang Yi Z Subject: Re: [PATCH v15 35/41] KVM: selftests: Add an MSR test to exercise guest/host and read/write Message-ID: References: <20250912232319.429659-1-seanjc@google.com> <20250912232319.429659-36-seanjc@google.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20250912232319.429659-36-seanjc@google.com> X-ClientProxiedBy: SG2PR02CA0083.apcprd02.prod.outlook.com (2603:1096:4:90::23) To CH3PR11MB8660.namprd11.prod.outlook.com (2603:10b6:610:1ce::13) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PR11MB8660:EE_|DS7PR11MB8853:EE_ X-MS-Office365-Filtering-Correlation-Id: e946d2fb-6f00-46a0-d9f2-08ddf4311919 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?YyBQ77cZWo/BrkOZ1E8YtpYUhNbKtV05JdO24YuFNx6itZQbdElL7ynM3yrA?= =?us-ascii?Q?BEFdjhDq9PsruXHdGZ0XzKm+0OvqfVxouNEG7b2Y1FX0e6xNhESQC4+J8Hmb?= =?us-ascii?Q?wR6olC43S3g/hfCySAiD9lqFNpeS9eNvMh+CkbVLuRfeTkMjpgKk8tutPUn9?= =?us-ascii?Q?7e2ms0UqZ6hh68cN59Gm0/TNcKHELOW5AvRj0iRKbEDHDpAXqdXjlcTvlNQy?= =?us-ascii?Q?6aDNvg5n4Y7WrnKQQV4Z9OryJ7BkVz9i7iyGNYSV8rYiP03Btgx1fFL69tmA?= =?us-ascii?Q?rfP+6S69d7+/p2CaKREc10G2otbtJsOHxurLOiOVM3p5yM4w6YKdcxYbfGld?= =?us-ascii?Q?qctgxxZXuGNHQDSAcyxOt+T8vKaIu0dqL9naCxbutpvxfTukq96LBKeZbWBn?= =?us-ascii?Q?TdR6GTFX6XkNq2mMMqIAXqgQgwRUbuLDBySbtOM5UUxoLirk5x3rHqddExaP?= =?us-ascii?Q?i0CgEzWpFBJ7QWjiGtQ37UJ837j7GOBcemzLRuUoumx1IDatKjbzjTBESsnk?= =?us-ascii?Q?J/R4T6oFI5K6NPc9ODA7jnZo3S2fH6ye3Psz5iy1jSiF6W8J5/PHe+doIdZx?= =?us-ascii?Q?LQW6MkgtIzR1xX3dIPBaEToM95xQtuRrcGSDtFE6ilBf0bneYB+lcfNk6UEl?= =?us-ascii?Q?ZFzzZs2HnURGy26xb/gdebmNJai+WuVqLTf1foqPPz/S4ta9elX2Nm7Ep36S?= =?us-ascii?Q?LlX2l5K4dVGjTubLQ5Xekza/KN89APwAgjXbSa3CVXOt7+UiU/Y0w8xwFw6A?= =?us-ascii?Q?6I4w3Hmwq4+KRth508mXA8xLC1u7VY0+0g2jnyNzPEhbmhDG9zkb/PJmKMTg?= =?us-ascii?Q?I9LvEcQqMx4cacSFd7G+PeBsu0pVatuvYOvIc4no2rdolpQNmhXuaxjiFAzo?= =?us-ascii?Q?1fNtg2C7dfCNe591300L707RASrujz2JiUupHCQpKLrb+y1BcfdgHwamaD4S?= =?us-ascii?Q?5baA/w9JTb2rgzFB6cUo6pdDHcVK4Ww6vLeTGfht10Jo54HYN6mtc4/pz/XA?= =?us-ascii?Q?eiL4NNkCzKxHHK6aEip0okFFVr/LxB7WlAtsgu7ZL/eySTkv0HtutGp8yZj2?= =?us-ascii?Q?0bjXQ0LM3fSNTt9lEgwHiPftuDz/L/nsWXZUjHuLT3JjMCtuypQ+W1eSzfU7?= =?us-ascii?Q?/svplO4Uwg55nF/mFbY4MYjv8LzKHdS6jkSVyCOTObN84Y0XxVjIiRJY8zaz?= =?us-ascii?Q?RR3utYiOL1WjVlYIi6qCPdqqkYdp/ZwivVV6zVaQOZ3HMvqS1UnqYjn0zkVM?= =?us-ascii?Q?I2hc7RnBDjSg7t7KaSFmfMFiqzPgwmCcDMpwBRerMH1cXcP6qU4FAFPv1QRI?= =?us-ascii?Q?vTUq1vlR0TPQnj9cxJvA+EE7Rbf3Q1tfytVTxqkeOb675TKx7dxAE2iKXXi+?= =?us-ascii?Q?DgkhRbl2bAFv+hqjnN5lsBN5UPtdBy8jyzvp6hPqG6L/kArMHA=3D=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CH3PR11MB8660.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(366016)(376014);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?iCrRpPRfB9tjH4F5my81lgmz9Qvvw4fJRHjK2Ozyyh06BSB9nXeAQ6Eunka+?= =?us-ascii?Q?GSmUrIdYbeNMZJZAMuy+p5hIiuMGrf8nb160Rt6WW6GBoWeiKTiXaR7CTlRU?= =?us-ascii?Q?Zz7NzqZXtpYmewIIVpOMolzO3LfUWa8oMm2nN1mn2ic91yf/EQys7t952/YV?= =?us-ascii?Q?e3VPFCnXf9720TweLXTdis+MRV0CFE3UzUOSovMQi7GJ7eocTgupascdxFlg?= =?us-ascii?Q?VIn6mV8+jKbbBSPn3EsYRTLvSBlT4Yoih/RgiKReIqj17hfkjWlb7NhKgRwB?= =?us-ascii?Q?s5fG/Exipk1gjJytwzHcZMHfodksJwMVJF9ToxSRhi3nFPjZd7UrCHjFXLE3?= =?us-ascii?Q?PUTv64BS+mLtUXx4E4fg2BK7HzvT0WTkqa6qr5j4IZVZFp58+4CGpsPZpUmu?= =?us-ascii?Q?dav059nHc1Cq0t0Zxqwg7PXs7/C9rGT2dkEIrRKkcDfBTXAtok7xtrRzBpKP?= =?us-ascii?Q?R0AvUreTQzpiV75XQFKEba+ycymaAyjvb8YGh/UbSb6EtCITphV6vqwJrnVn?= =?us-ascii?Q?emOwOmURr3laq3oXzN98F5xamFImQzJ21dl3kAlGlj2l4/AkhlRiXe+o1AOn?= =?us-ascii?Q?/22MUY97fzC01BEtJIVTm8VEoEIAp55CC5FdSd3KbyoCl27TzGsNh+g0pGMT?= =?us-ascii?Q?1FKeGk+Hm3nyKGDpLprH72UKM56a0IR9Zr83stEFTPrGhDkOh2fCMrJL4pZX?= =?us-ascii?Q?Zka1CUU0wpKmN3KjOIze6esOQb1pGWJAA2CChgc7ewwJPjGK4C+oepnYkU6S?= =?us-ascii?Q?XPjbk/Rjp9acaOz669uPG8uSeu1rF91REodLwwtTwyTFDx/l9leczhkX4UFO?= =?us-ascii?Q?Xy3JDDxP3kxR4p1QAWVQcIjcsGmN7G19PFoDPz28uAdEzxOJV0RrtwsOsrUk?= =?us-ascii?Q?D0oZdQK9mEGqPda5y3rMScYnXcln7wK+z5w5UpqmsIJXquEyTbJa/Oe/Ly80?= =?us-ascii?Q?LrvY89CjIbozAgiQeRyS3WmYguad06uvtbOUbdKs0pYJEMwdh4WQCUpC6+mh?= =?us-ascii?Q?huFuPZXlm2r/6QCM7aaBylxbK1ZzgZ1DZ3FeK8jGn2FhXb4eAqhDiUpxLlzf?= =?us-ascii?Q?Qy58iXm3GH+SlSmGKrTXshMeuny8bVKlewc9Tru+fJobszXmCj3Eyq4adm1i?= =?us-ascii?Q?PcoVxEvc9IJSnkKnjcAhfigSUjis+mCOBziaxdvGZQIrAw7gI8dWpahdHBcf?= =?us-ascii?Q?Hw4upJtZ+Gj+nxe4zuTnXRwLA8Cim4QjzVFM8M7l925H4dBvVHSoNsGZB13w?= =?us-ascii?Q?fILkiWxdW2+q1icyVjr4Vom6bT7DA5jz+3fpn/VjizxQYRDNYs7sxdFwN2B/?= =?us-ascii?Q?VSva+j4YHOPW26gpYq7jRJTulJZzN7cas62U2mgZ8EZR0YIdTpQdEn7RX15h?= =?us-ascii?Q?9YDBzFohXRLn6KnBGAjYBAiKXsMJUTbYIib9E5Vb4VgfHv+ye1xRRjJX7YO6?= =?us-ascii?Q?/DfjniSFmN6qP4oKoUmAAF8Xk3KI6GRKDliv+iDtO5MMw+JcoGCdtAW0bw+9?= =?us-ascii?Q?TBxiaOB9uErplkWlvUV+7KgTptyAu6lEYCEhlrHG8AFSJ1khH0HVHw85Lobm?= =?us-ascii?Q?ksPTuWxii5nP3/yG7BvyXK0DBFhfcy9bmRojZpHn?= X-MS-Exchange-CrossTenant-Network-Message-Id: e946d2fb-6f00-46a0-d9f2-08ddf4311919 X-MS-Exchange-CrossTenant-AuthSource: CH3PR11MB8660.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Sep 2025 08:23:07.0429 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 1vAnWtHngF+t2V63QXIQmZsfSVB8SFbQJXABJ9qqMq3Hqa+XofkCdPKIL0GlMR5PlB5FkCSRgQywf5juetwSmg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR11MB8853 X-OriginatorOrg: intel.com >+static void __vcpus_run(struct kvm_vcpu **vcpus, const int NR_VCPUS) >+{ >+ int i; >+ >+ for (i = 0; i < NR_VCPUS; i++) >+ do_vcpu_run(vcpus[i]); >+} >+ >+static void vcpus_run(struct kvm_vcpu **vcpus, const int NR_VCPUS) >+{ >+ __vcpus_run(vcpus, NR_VCPUS); >+ __vcpus_run(vcpus, NR_VCPUS); ... >+ for (idx = 0; idx < ARRAY_SIZE(__msrs); idx++) { >+ sync_global_to_guest(vm, idx); >+ >+ vcpus_run(vcpus, NR_VCPUS); >+ vcpus_run(vcpus, NR_VCPUS); We enter each vCPU 4 times for each MSR here. If I count correctly, only two of them are needed as the guest code syncs with the host twice for each MSR (one in guest_test_{un,}supported_msr(), the other at the end of guest_main()).