From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) (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 B32FD13CFB6; Sun, 9 Mar 2025 22:06:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=192.198.163.9 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741557987; cv=fail; b=cjxXWTyIQmtN4/2ZC5116n2Dr27Dnu43wMBBPzFDtGl7FpcY4is7ti1XkDXBH1WzhTiTEydyldwykMTplaTJ8EUCrOFrxVvjN5ka+rgY75yLIGF1X8w1Vw33tAywA9HvX3sPXZ+rD6G+qwzZ3a0fr0eQFN7VFNXJDg/F0slGnvE= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741557987; c=relaxed/simple; bh=yHdyezjEBRJtPW0Q2rdkYe/eWoAyOkmKIF96B/U2ngs=; h=Message-ID:Date:Subject:To:CC:References:From:In-Reply-To: Content-Type:MIME-Version; b=ogLzW349zk3Ck785i+BK/+QVFCIbD+2bpzDlXJ5p4nagftqMKNISSispdm52BlKyq8CsY16lkTxrtAevQFP/Izr1S24lU5y7NVWiQ7yK2bgv00BJ1pTr0HqL54nQWsKlDh+W2jd64fHxq64TRpNeGrkrf7tU4d8M6NuzfKRI2T8= 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=Hnianf39; arc=fail smtp.client-ip=192.198.163.9 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="Hnianf39" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1741557986; x=1773093986; h=message-id:date:subject:to:cc:references:from: in-reply-to:content-transfer-encoding:mime-version; bh=yHdyezjEBRJtPW0Q2rdkYe/eWoAyOkmKIF96B/U2ngs=; b=Hnianf393TCLu2+Jqif2xzLoMQ9wor39Km/EQDqP9dhfwFn2OX7b4qCV XPjwD2nUE7GzawO4wdAJ44n8QckSFpS/Q93EP2Q7DEjvOSS/tnSPeBj0m /gWFS7MgUH8M7tIzPod6Fc2teFLHBEVv+YlsuipsMDqFQHM2NlYKuI1NJ UzX8sm5UcXHIZk6hRX8dwkqzWb5cHFxRH8EGb3VgCgRHSEv/X6iqdHbwF q75zUgR7Y8H7J9TPx02nfhDkOlG4Lhd4OUNURok585adEf3jVOHUF4obE LAeJPM6P05D/QxOfsXZZLuwQcIh0BU3BGogNjVruB/K0q2pkUhNYZ3d5H A==; X-CSE-ConnectionGUID: RNmO689mSOitThl6Ts91XQ== X-CSE-MsgGUID: Y04TodwdQAqnmtqyou/w+w== X-IronPort-AV: E=McAfee;i="6700,10204,11368"; a="53172273" X-IronPort-AV: E=Sophos;i="6.14,235,1736841600"; d="scan'208";a="53172273" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Mar 2025 15:06:25 -0700 X-CSE-ConnectionGUID: lovz9WexTv2FFMKkrtH5UQ== X-CSE-MsgGUID: ZUJ5d/BpQU+CuvSpJQWadg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.14,235,1736841600"; d="scan'208";a="150594612" Received: from orsmsx601.amr.corp.intel.com ([10.22.229.14]) by orviesa002.jf.intel.com with ESMTP/TLS/AES256-GCM-SHA384; 09 Mar 2025 15:06:25 -0700 Received: from ORSMSX901.amr.corp.intel.com (10.22.229.23) by ORSMSX601.amr.corp.intel.com (10.22.229.14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.44; Sun, 9 Mar 2025 15:06:24 -0700 Received: from orsedg603.ED.cps.intel.com (10.7.248.4) by ORSMSX901.amr.corp.intel.com (10.22.229.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.14 via Frontend Transport; Sun, 9 Mar 2025 15:06:24 -0700 Received: from NAM11-CO1-obe.outbound.protection.outlook.com (104.47.56.173) by edgegateway.intel.com (134.134.137.100) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.44; Sun, 9 Mar 2025 15:06:24 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=ooJwd5pe4y7nFlYhGlse9Z8mR05AiODzqKkl4BUjtcKyvHO2FoTFqEGf2ZEhWoxROJrwAEd9lGIdmdvTi87W/2P1vIp+U2xZ2ilUE1B/qXNVd9MqjXOPVeHQLqeNopq7JEm8+xwVAUBvTOi42iZh6+jQrQ0JU4gMEDmNjOGD52i9Eq1/4Gg4MXAmqGTfQQgUVHa8wWrf6Xl3YSHiwuEoDBob0rP3mpKMsdnOcivMfjKzm03eoZRTnygkpBIvQJQMcJl47epYY0STTtYtK7O5Ass3WhCs4HbPHbYK6+3fhwYt4hwJEe9DMmWzTGnCfs3BJG23t0NLfQxlcroOMyd0mA== 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=QE0Wj9vMtaJ2lkPjQ25JLOOM0XsgG53c2j0oUgoIUDk=; b=hcHOOqU8DEceBhuOmQNFE7CcR8K8RlIiiHzJsu1RLu1rYi1/q7DakHSPfxrKcBGMbt3GK/M0oWHmcPci7KrHU4TlobIUKLbna92AAx8ba6tIragkbHOhbrC7gt83H1SbX7rK2TFZ9kW4yOXRoiTFIR0hkvc5nMtY65XBf/zwbK9XU/JeBFEH+zTzO3/CuRVCrsGO9tciOYibtSQDM/INUiqIhXtDxtTpD+x4WcQmgARAYNvBSnyc54KT4BUXTCOPVyr9L2R+UYp3azV9eI2lhQrMlX3fWDRO0JUv+QXIx6RmiLj4z5ewYXRuO6EX652dPHJnGcY9NaKvC5pFIjRDQA== 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 DS0PR11MB7925.namprd11.prod.outlook.com (2603:10b6:8:f8::18) by CO1PR11MB5107.namprd11.prod.outlook.com (2603:10b6:303:97::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8511.26; Sun, 9 Mar 2025 22:06:22 +0000 Received: from DS0PR11MB7925.namprd11.prod.outlook.com ([fe80::b1ef:c95b:554d:19c9]) by DS0PR11MB7925.namprd11.prod.outlook.com ([fe80::b1ef:c95b:554d:19c9%6]) with mapi id 15.20.8511.025; Sun, 9 Mar 2025 22:06:22 +0000 Message-ID: <481b6a20-2ccb-4eae-801b-ff95c7ccd09c@intel.com> Date: Sun, 9 Mar 2025 15:06:19 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 04/10] x86/fpu/xstate: Correct guest fpstate size calculation To: Chao Gao CC: , , , , , , , , , , , References: <20250307164123.1613414-1-chao.gao@intel.com> <20250307164123.1613414-5-chao.gao@intel.com> Content-Language: en-US From: "Chang S. Bae" In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SJ0PR03CA0135.namprd03.prod.outlook.com (2603:10b6:a03:33c::20) To DS0PR11MB7925.namprd11.prod.outlook.com (2603:10b6:8:f8::18) Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR11MB7925:EE_|CO1PR11MB5107:EE_ X-MS-Office365-Filtering-Correlation-Id: f962f58b-13da-449c-5fa8-08dd5f56a050 X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|366016|1800799024; X-Microsoft-Antispam-Message-Info: =?utf-8?B?Q0N3c2FqalhPL2kzeThsTURtak9CK3VhY1hmejlEejgvZ3ZQdDVpTC9zYy9U?= =?utf-8?B?dXZIdXZkZ3lpQ0lQaFkvanh0MXJZNEJQY1VYdExFOXU1Zk5zZTV4eDI2RmdJ?= =?utf-8?B?QTNYYXRFQW8yMnpNQUw0UVA0TTJ0SlNpemdyeWJOQ0thcG9TNjcwUWRjemo4?= =?utf-8?B?K2F4N1VNb0h3c0FESzZ2UitrWVl3Nzc5S2JxMk5hU0ppYkdMRjIwR0FiYmx4?= =?utf-8?B?VnZTNDdPNVNaMmppM0czaXN2U2NONERBUUl4STdOY3RwUDNyVWR5ZVhkeGN4?= =?utf-8?B?RWZua1R2cC9ZM0tEK3p4MEtST0pQZzlIOXFibVJTMUJseVB2Um10YitnYmFm?= =?utf-8?B?b2kzcVprUW40OVVRN2c4NzZvSmlaL1hKZVNrZm0zZHY2VGJUcmd4dHpUSU5H?= =?utf-8?B?UThZQ2Y1L1dKMEMrRmZJQU1VY2ZJZkx4ZHUzZG94c2xNZmE0VXJMZlN1bitm?= =?utf-8?B?a0sxNS8yMDJ0VFV1NU1DbExzL3E0dWsva2c3SlhuUFA2bGp5NGdiRUh2V1dU?= =?utf-8?B?OTJ0MWhFMTZ6NTFOYXppVUVaSTZYQW9xUEtBd1lrUzBrU3psam9ra01POG5Y?= =?utf-8?B?bml1RnRtdCtkRklVNDZ5L09OeWFaOGZsdUs5VnlWa0I3MVFnTDhYcGxyS1VG?= =?utf-8?B?c0UxVVcrSUp1RGw4bHFja05lWU8xTWo1VkEwVTQwb2ZidFNHWElJTDlsb0ww?= =?utf-8?B?cGFTWFB5aEJ3c2xIcGJocUdBejliZ3ZDdVBHcGxDUm1rTWJvK29LNDlKbzBJ?= =?utf-8?B?R2hyekVtVHBiTVFETXB1TDV1UkFvWHkrSGtKMW8vaVFWOGcra2JKdXZIYjBp?= =?utf-8?B?Z1B0N2lCYkZRN1cvb2dmdUZxSyszem51RWtDYWVPV1k2SUlrM3JLenB3MVFJ?= =?utf-8?B?RkR2a1IrMmhqSnZQNFhDUTNSU0lUTTA5ck1HY1FsOHgrUkVCdTdERDh2eWhh?= =?utf-8?B?SjV5OVBzUURnNXB6dDFaMUQxcjF6a0lVdjJtVm16ZjNIMXFrZXFERXRQQ1Ir?= =?utf-8?B?clMwb2FTNlRnMzNQMjFVc3BnZ2ZmZUtuZ0NSMUMxQ3dQaENHVjJMaFJiQU8r?= =?utf-8?B?YVNrN0Z2TitDclBLUDEzN3VNcmxqSUYyRzAraDN3ejhIcmhscVFkOVVtR1ky?= =?utf-8?B?UFJyVmk5MkV5c25ScUZEc3I0dS9sSDdiMDk0UkJBbmpjOXU5ZVZHNEJkTzBk?= =?utf-8?B?cDVJVSs4MkZNYWdBQWtjRURvVzRNRFB0TmdWSDhvekJJVzE0WFdpc2VtTUIx?= =?utf-8?B?RlNReENuZjkraGJEYVlyckoyYy93Tm5IQ3BjU0JDQVRkY3lWUWZRaEJHcFp6?= =?utf-8?B?ZVBDN2RsOUZkRmQ3SkdJSVlWZkZXeHV3UEQwb25nMkJVYytDTDl4KzJpUklj?= =?utf-8?B?VFJxNm1WbTRPZ0xoNXp5endZN1VDcU05bWVTZlRsVkRscjgxZVcrZ25WMzNY?= =?utf-8?B?OFROMEFvc0VmUk1jVC9xdVYzL2ZOK0RtWSs4Y0xZMDVVR28wVDlvRzBmN3F2?= =?utf-8?B?ZU5HZHhUZW9TY1I2YzdkblZ4M0NKTlJkZjlFaWZXY3lBYW9CdmY2ZlpWQ1Q1?= =?utf-8?B?a0tXenVsdGhEOCtMWnE4NSt0bjFUMGUzTUdTSXlRNkhpcTE0b1IwQzVvQis2?= =?utf-8?B?Q2kzSWtiaml5Y2xNSDF0TDJSSGRTVXBoWlY3REFQUzg0SkxxSzd4SnMyazhU?= =?utf-8?B?V1dPTlVVMndST09DVVNYTkg5d3BYVFI4MTg1U3BXb1JXY1c4ZWovcGk0S2RX?= =?utf-8?B?SXZ0MCtEWVNIWGRzMHdEdHRTQVgyMzdHQTlaQWtBeDhWZFBqb3ppNUN5YzBh?= =?utf-8?B?dWVnT2xaSEorcUUyc2dxQ0dML2srT0JwVkorL3YweVVRRmNMNkRIZ3NJYldB?= =?utf-8?Q?34e3xOqBzRccn?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DS0PR11MB7925.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(376014)(366016)(1800799024);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?b2ZTdDlEL08rOHdzZ3NhWFlVYlZHR25lTmIrYVUwMnJXTXcweXVtcG8wWlVB?= =?utf-8?B?Umszb2dhaEZ1SXd2T0Z3b0ZpbHRta2FSQ1FldTM3TmFlMzg1cTNTb2g0ZGhW?= =?utf-8?B?RUdFNzYrMnQ0dS9YTm95cktvRDBTS25EK1pjdFh3N2xtSjFuOFhiTlZEWmd2?= =?utf-8?B?SWdxSUFWQ0JqQ2V3TWpTOVRsNDRqTUdhSDJSSmt6OGF5aFZhb2NuSFlmUnEv?= =?utf-8?B?VWUvQWY2VHlVUWh1bXJKd0xmc2JwSU4zemZBb1MybE11cGY3K2lPTTdKeEQ4?= =?utf-8?B?Rm5OMkk4UFZObXpORkpOVEd0bjczR2tlUTVGZ2RvZzMrSXdOYllHbk80VHdH?= =?utf-8?B?SmVOQk55L295bGtSdW1YV3VRdGtqei8yN3pSa3N5enREM3p2cW5UVUtvWDJU?= =?utf-8?B?YzRuUk5GZ05OS2xxOFpLNUh4d1NzOUxyVXFLK2VuendyOUNnTHF2RVJZTTFR?= =?utf-8?B?ZHRQOHBxMmpublRyTVRIb3RFNGlia210c3B3bjF4YkhOcEJ3R1pVQjlES1Z3?= =?utf-8?B?dEJEQ2cyUVR0bnBiaHJUNHhxaDJuOXQrQWh4UWwyeXd1Yjd0TTQyVkttRitK?= =?utf-8?B?c2tXQStOSnJuRzBsN1FoOVd0MDhaNmdOM1RRWlBVNlVweE1jR1l0aUZtall0?= =?utf-8?B?cjJTbHUrMllzM2tidzByRjZnWGhXK3dpSCswRlJTMCsyWnBUN3hJeTIxK29V?= =?utf-8?B?SzRScjVUSVZ0UTlPSS9vSVlRNXpqeXdJSUlRckVlVjc1RUpzMlhseVdkbXVa?= =?utf-8?B?dGRHNWs1V3N0anR5cGs1L0FaNlBNNW45eHp6UWJ6T1lDU1dCVG14aVhJblFP?= =?utf-8?B?cWwranc3aVl6TjB5OWVlaE1GT3BFTVVFWmQ2U2lvcjFiOFc5MTRjcUFuUFc0?= =?utf-8?B?NUtjUE1HL0toOTM1VGNVSFpYSmtCRUhrdG5Mb1k1OVJpRmliZERjajB0R29H?= =?utf-8?B?Z0QyM3ZGN3BLdU8vSjJaRzdzZVFRZ2dSOU5xOC81UWg5N0FXcGVKSDZvOXlY?= =?utf-8?B?VTkyYm5nbjJpbnpjUDB5TDA3LzQwZzB1aDFwS2U5THRQQmVFZTZjWXlLcyt1?= =?utf-8?B?ZHRZRXZ0aVE1RmNsWlJZbmxJUTRrblJSR2NZRHZPRElnd1YxY21SUjNRZm1v?= =?utf-8?B?YThQUkpTa2pNZkF2czc2WmRnSGFQUWYxVkJMWUZHRlNJZ2hlMmdQUlovWXpM?= =?utf-8?B?YnlqbUQrRVRMNnozbVJjWVRDMk1kR2F0UXhUV3V5WFE2bGhPM2t4RnQwSjhq?= =?utf-8?B?WlZpVThoUFh6RUQ3NXVXRmc0NWxLNGRUL2Y2ZzlqZkQ0REdRZEdJc1JobUNy?= =?utf-8?B?eFF3ODJoaUppc0h6MXFaWWpTMXRwYmFoVjhzOXZXWWo4UzdiOGdINUltMmpN?= =?utf-8?B?ZUg2dHZIcWErdUlmK2FvcEF3Z0dVRW5IWFFLaElHL2F3cVNEd0pPS1JwcGhL?= =?utf-8?B?bHB4RTY5MmJlcU93dkJPaDRXbGxrWlJkaGJRZkFLMFlWUHkrb3V6RFJMeFkv?= =?utf-8?B?blhlMUlWNDlDR1FIMVVZM1NFRjRyN05FMENlOFhYN0UvVUZwOXY0QVBLTUFs?= =?utf-8?B?OTY2ZFJxU0NpWThpZWp4bUE3Qm9tUDJLRm9BVElqVWpDUkloWmJRR1NUQ1JM?= =?utf-8?B?MnA1RTBXZ1ZPYmxwUi8vb1pHbDVFbGZnU1JqT0NUU2FSMlAydzBPMkwrRExy?= =?utf-8?B?TXpWdlVEUEMxNWUvNVhkeDltWE9uSWxOTWFXeXhaYkxIZ2tpcFZiU2EvczB1?= =?utf-8?B?SmJCQlBwYmc4WmduQWRvVWFiMzhtdEZOQVdsem1PR1NxYm1aNUx2MytpcEVZ?= =?utf-8?B?Z1NDcEsxQUMwZWhkSXFDWFJCWnR4ZzJtMEp2WUl6bUJKQ2JkN1RJTXB6cWV4?= =?utf-8?B?aUJEOWV3MTlJSE4zZC9RbEF3ektSaG9CWnNabERJdk9VMHZsQUVVSEk0N29a?= =?utf-8?B?VUdmdWVaVUtUUldCdnFRUmZoenBsZjUvdXB4ZDlDWXlWRCswa0ZlTVpWR1Ny?= =?utf-8?B?cS9oOHFRYmhWM3BtSW14SlI3b1B1UDMwNXppUjJtRG52cGdRbG4zU2VOdUxK?= =?utf-8?B?QzBzbDFIajlLeFVuRURSbUFiMVVIM1cwNnVCTmxoOGluU0toZEM2VVBKSkoy?= =?utf-8?B?ZmxCZE5sbHY5Nmx2bGhhbVFoeVlaMWFRRFF4ck1MbDBkTFdoMWJ6bklES2Nq?= =?utf-8?B?c3c9PQ==?= X-MS-Exchange-CrossTenant-Network-Message-Id: f962f58b-13da-449c-5fa8-08dd5f56a050 X-MS-Exchange-CrossTenant-AuthSource: DS0PR11MB7925.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Mar 2025 22:06:22.0005 (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: ChlExENlwPLKHoJGfYmARYZZeQ+s+RH7wFmd5K+5Q5ChW9iW9zEDOwk750QwOCGjUfrxAyW75s581SGJu/f5HK8A64FYPLFw8RFG/ruE89Y= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO1PR11MB5107 X-OriginatorOrg: intel.com On 3/7/2025 6:49 PM, Chao Gao wrote: > On Fri, Mar 07, 2025 at 01:37:15PM -0800, Chang S. Bae wrote: >> On 3/7/2025 8:41 AM, Chao Gao wrote: >>> >>> diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c >>> index 6166a928d3f5..adc34914634e 100644 >>> --- a/arch/x86/kernel/fpu/core.c >>> +++ b/arch/x86/kernel/fpu/core.c >>> @@ -218,7 +218,7 @@ bool fpu_alloc_guest_fpstate(struct fpu_guest *gfpu) >>> struct fpstate *fpstate; >>> unsigned int size; >>> - size = fpu_user_cfg.default_size + ALIGN(offsetof(struct fpstate, regs), 64); >>> + size = fpu_kernel_cfg.default_size + ALIGN(offsetof(struct fpstate, regs), 64); >>> fpstate = vzalloc(size); >>> if (!fpstate) >>> return false; >> >> BTW, did you ever base this series on the tip/master branch? The fix has >> already been merged there: >> >> 1937e18cc3cf ("x86/fpu: Fix guest FPU state buffer allocation size") > > Thanks for the information. I will remove this patch. But, I think there is a fallout that someone should follow up: The merged patch ensures size consistency between fpu_alloc_guest_fpstate() and fpstate_realloc(), maintaining a consistent reference to the kernel buffer size. However, within fpu_alloc_guest_fpstate(), fpu_guest->xfeatures should also be adjusted accordingly for consistency. Instead of referencing fpu_user_cfg, it should reference fpu_kernel_cfg. Thanks, CHang