From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from CY3PR05CU001.outbound.protection.outlook.com (mail-westcentralusazon11013001.outbound.protection.outlook.com [40.93.201.1]) (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 152E137BE9C; Mon, 2 Feb 2026 16:09:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.93.201.1 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770048566; cv=fail; b=s2G9Jw4IAaYlz120Hrsoyb5DgrG4PsQx/kjlv/PQ6JnenYbDTJ9JHNN2U3gkt34Kmmpi0wMWeYF+Q18x/q7WXeu0ZwFBfFjirlfWkmOfB4bFlSls3kogyb7lnz53+DmTqHBfbTXSV1ylOwkFrilxWg1lFJnbaEQXcW7IlXWMRVc= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770048566; c=relaxed/simple; bh=wHMQvQRp3++1a9x1USm7Q4YFSsp3F3KPGv2IuWQ2kU8=; h=Message-ID:Date:Subject:To:Cc:References:From:In-Reply-To: Content-Type:MIME-Version; b=gXmFsTjQkqeSlnCEWrnpxiGANLpJS4kOSyewVXFAgZ0/GnDtXDBnqLZp8n8M78x0nisvaQ2sx7x39pAWFLVcd86FLAAdjACip6FYNnxGv/PTeyPusIxCX9S20jC5Spy+53A4rL8GNJ+u/CMZ4GEjFojZpC9Yo76Qr+75eNXNVtw= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b=Ugqj2zz6; arc=fail smtp.client-ip=40.93.201.1 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="Ugqj2zz6" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=kpZBl8Gqtfi6euC+qaV6DiQXmG74qU+fPxBTAAkEB9YwsEBd8MZu3rdEYeZgAHMD9rlCAPFXRQqdxzAQTo1RRXfh+JDU2e1saA4d2kMwvlWLewcFKB9PAtNeYFkqxjmy4yFQSR+B/9hM9XjWmTJrIZqng+DcViCz6v1MFRuHHmN69tgpp1ML24H7t9uSECbLCn5e4aX9P+xhlwbLpEilDsEGVBJZABz9f9fRedf7l+rZqYGxQoopwWodeaQBOTbwJh7GeGddT0lYJOFMXq+0AwrTl4Wf+ElUD21Y8JRmBcQNrsgE0bYz5vjiGUPf22a3W++i83SOXNyvijTvxbAGaw== 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=lCYrsz1WOKeUq20jEZiYarn/DdptiBIt1mJB9eFAEao=; b=Xvm4MXyXZuUYajZglS+7h5ZNYQPdNVmX5nP2SuEmu0w0EjihR+lIkqIEVCH2Lnp/Eg1i+gRKmdgG4TN4rBFXWmzAQnhxt7gzLF/pbVRcWjRzZugwgg4pWtpRblZm99ylux/kKjcYb6XfF15FvkUcpxu3pjS8p+9olojEBma7upqrZalBzQNqIMv/FvjQc2cX+Y1r+fpXnUJVYp4twezl+an0V8uA0Q/R2xklIfwbo2PZujwtLIwq1UMa5i8h8cueDsoSxAWkQqXcNwwyBwBye7Amp6Z6wpEErGBAlEBjwjQLYip6TWOVRMomxMDPRfM/3eepAywEyiEfVEejZ/hFrQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=amd.com; dmarc=pass action=none header.from=amd.com; dkim=pass header.d=amd.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=lCYrsz1WOKeUq20jEZiYarn/DdptiBIt1mJB9eFAEao=; b=Ugqj2zz6hroW52ItSKO4fjpTBwg6rKBSG0iCdxNa+6w5+COJ2GnXpFFL2XuFNdutEF4i/ipy6LgHQt5lHKu9cbjZfV+1lG8YqsopJvs8XXhFNtAH4pabPRFglHfPx5SeC8Tkduf3OCseoRe7035GwDO5CT2CoftZLEdAZv9cHaM= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from DM4PR12MB5070.namprd12.prod.outlook.com (2603:10b6:5:389::22) by DM6PR12MB4041.namprd12.prod.outlook.com (2603:10b6:5:210::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9564.16; Mon, 2 Feb 2026 16:09:22 +0000 Received: from DM4PR12MB5070.namprd12.prod.outlook.com ([fe80::f3f2:852c:78d5:9353]) by DM4PR12MB5070.namprd12.prod.outlook.com ([fe80::f3f2:852c:78d5:9353%4]) with mapi id 15.20.9564.016; Mon, 2 Feb 2026 16:09:22 +0000 Message-ID: <3392d89c-ebf5-48f2-b498-a7dc532a0493@amd.com> Date: Mon, 2 Feb 2026 10:09:19 -0600 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] KVM: SEV: IBPB-on-Entry guest support To: Borislav Petkov Cc: Kim Phillips , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-coco@lists.linux.dev, x86@kernel.org, Sean Christopherson , Paolo Bonzini , K Prateek Nayak , Nikunj A Dadhania , Michael Roth , Naveen Rao , David Kaplan , stable@kernel.org References: <20260126224205.1442196-1-kim.phillips@amd.com> <20260126224205.1442196-2-kim.phillips@amd.com> <20260128192312.GQaXpiIL4YFmQB2LKL@fat_crate.local> <20260129105116.GBaXs7pBF-k4x_5_W1@fat_crate.local> <20260130123252.GAaXyk9DJEAiQeDyeh@fat_crate.local> <2295adbc-835f-4a84-934b-b7aba65137a8@amd.com> <20260130154534.GCaXzSHgkEFnk5mX14@fat_crate.local> <6556bacb-2e81-4aa8-92e4-0ff8642f4ec9@amd.com> <20260202154936.GAaYDHkOMpjFpoBe5m@fat_crate.local> From: Tom Lendacky Content-Language: en-US Autocrypt: addr=thomas.lendacky@amd.com; keydata= xsFNBFaNZYkBEADxg5OW/ajpUG7zgnUQPsMqWPjeAxtu4YH3lCUjWWcbUgc2qDGAijsLTFv1 kEbaJdblwYs28z3chM7QkfCGMSM29JWR1fSwPH18WyAA84YtxfPD8bfb1Exwo0CRw1RLRScn 6aJhsZJFLKyVeaPO1eequEsFQurRhLyAfgaH9iazmOVZZmxsGiNRJkQv4YnM2rZYi+4vWnxN 1ebHf4S1puN0xzQsULhG3rUyV2uIsqBFtlxZ8/r9MwOJ2mvyTXHzHdJBViOalZAUo7VFt3Fb aNkR5OR65eTL0ViQiRgFfPDBgkFCSlaxZvc7qSOcrhol160bK87qn0SbYLfplwiXZY/b/+ez 0zBtIt+uhZJ38HnOLWdda/8kuLX3qhGL5aNz1AeqcE5TW4D8v9ndYeAXFhQI7kbOhr0ruUpA udREH98EmVJsADuq0RBcIEkojnme4wVDoFt1EG93YOnqMuif76YGEl3iv9tYcESEeLNruDN6 LDbE8blkR3151tdg8IkgREJ+dK+q0p9UsGfdd+H7pni6Jjcxz8mjKCx6wAuzvArA0Ciq+Scg hfIgoiYQegZjh2vF2lCUzWWatXJoy7IzeAB5LDl/E9vz72cVD8CwQZoEx4PCsHslVpW6A/6U NRAz6ShU77jkoYoI4hoGC7qZcwy84mmJqRygFnb8dOjHI1KxqQARAQABzSZUb20gTGVuZGFj a3kgPHRob21hcy5sZW5kYWNreUBhbWQuY29tPsLBmQQTAQoAQwIbIwcLCQgHAwIBBhUIAgkK CwQWAgMBAh4BAheAAhkBFiEE3Vil58OMFCw3iBv13v+a5E8wTVMFAmkbaKgFCRZQah8ACgkQ 3v+a5E8wTVPFyg//UYANiuHfxxJET8D6p/vIV0xYcf1SXCG78M+5amqcE/4cCIJWyAT3A1nP zwyQIaIjUlGsXQtNgC1uVteCnMNJCjVQm0nLlJ9IVtXxzRg0QKjuSdZxuL5jrIon4xW9hTJR 94i2v3Fx5UWyP2TB6qZOcB0jgh0l01GHF9/DVJbmQlpvQB4Z1uNv09Q7En6EXi28TSv0Ffd1 p8vKqxwz7CMeAeZpn5i7s1QE/mQtdkyAmhuGD12tNbWzFamrDD1Kq3Em4TIFko0+k5+oQAAf JFaZc1c0D4GtXwvv4y+ssI0eZuOBXapUHeNNVf3JGuF6ZPLNPAe5gMQrmsJinEArVYRQCuDA BZakbKw9YJpGhnSVeCl2zSHcVgXuDs4J2ONxdsGynYv5cjPb4XTYPaE1CZH7Vy1tqma8eErG rcCyP1seloaC1UQcp8UDAyEaBjh3EqvTvgl+SppHz3im0gPJgR9km95BA8iGx9zqDuceATBc +A007+XxdFIsifMGlus0DKPmNAJaLkEEUMedBBxH3bwQ+z8tmWHisCZQJpUeGkwttD1LK/xn KRnu8AQpSJBB2oKAX1VtLRn8zLQdGmshxvsLUkKdrNE6NddhhfULqufNBqul0rrHGDdKdTLr cK5o2dsf9WlC4dHU2PiXP7RCjs1E5Ke0ycShDbDY5Zeep/yhNWLOwU0EVo1liQEQAL7ybY01 hvEg6pOh2G1Q+/ZWmyii8xhQ0sPjvEXWb5MWvIh7RxD9V5Zv144EtbIABtR0Tws7xDObe7bb r9nlSxZPur+JDsFmtywgkd778G0nDt3i7szqzcQPOcR03U7XPDTBJXDpNwVV+L8xvx5gsr2I bhiBQd9iX8kap5k3I6wfBSZm1ZgWGQb2mbiuqODPzfzNdKr/MCtxWEsWOAf/ClFcyr+c/Eh2 +gXgC5Keh2ZIb/xO+1CrTC3Sg9l9Hs5DG3CplCbVKWmaL1y7mdCiSt2b/dXE0K1nJR9ZyRGO lfwZw1aFPHT+Ay5p6rZGzadvu7ypBoTwp62R1o456js7CyIg81O61ojiDXLUGxZN/BEYNDC9 n9q1PyfMrD42LtvOP6ZRtBeSPEH5G/5pIt4FVit0Y4wTrpG7mjBM06kHd6V+pflB8GRxTq5M 7mzLFjILUl9/BJjzYBzesspbeoT/G7e5JqbiLWXFYOeg6XJ/iOCMLdd9RL46JXYJsBZnjZD8 Rn6KVO7pqs5J9K/nJDVyCdf8JnYD5Rq6OOmgP/zDnbSUSOZWrHQWQ8v3Ef665jpoXNq+Zyob pfbeihuWfBhprWUk0P/m+cnR2qeE4yXYl4qCcWAkRyGRu2zgIwXAOXCHTqy9TW10LGq1+04+ LmJHwpAABSLtr7Jgh4erWXi9mFoRABEBAAHCwXwEGAEKACYCGwwWIQTdWKXnw4wULDeIG/Xe /5rkTzBNUwUCaRto5wUJFlBqXgAKCRDe/5rkTzBNUw4/EAClG106SeHXiJ+ka6aeHysDNVgZ 8pUbB2f8dWI7kzD5AZ5kLENnsi1MzJRYBwtg/vVVorZh6tavUwcIvsao+TnV57gXAWr6sKIc xyipxRVEXmHts22I6vL1DirLAoOLAwWilkM+JzbVE3MMvC+cCVnMzzchrMYDTqn1mjCCwiIe u5oop+K/RgeHYPsraumyA9/kj8iazrLM+lORukCNM7+wlRClcY8TGX+VllANym9B6FMxsJ5z Q7JeeXIgyGlcBRME+m3g40HfIl+zM674gjv2Lk+KjS759KlX27mQfgnAPX4tnjLcmpSQJ77I Qg+Azi/Qloiw7L/WsmxEO5ureFgGIYDQQUeM1Qnk76K5Z3Nm8MLHtjw3Q7kXHrbYn7tfWh4B 7w5Lwh6NoF88AGpUrosARVvIAd93oo0B9p40Or4c5Jao1qqsmmCCD0dl7WTJCboYTa2OWd99 oxS7ujw2t1WMPD0cmriyeaFZnT5cjGbhkA+uQGuT0dMQJdLqW3HRwWxyiGU/jZUFjHGFmUrj qFAgP+x+ODm6/SYn0LE0VLbYuEGfyx5XcdNnSvww1NLUxSvuShcJMII0bSgP3+KJtFqrUx9z l+/NCGvn/wMy6NpYUpRSOmsqVv0N71LbtXnHRrJ42LzWiRW2I5IWsb1TfdMAyVToHPNaEb0i WiyqywZI5g== In-Reply-To: <20260202154936.GAaYDHkOMpjFpoBe5m@fat_crate.local> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-ClientProxiedBy: DS7PR03CA0348.namprd03.prod.outlook.com (2603:10b6:8:55::8) To DM4PR12MB5070.namprd12.prod.outlook.com (2603:10b6:5:389::22) 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: DM4PR12MB5070:EE_|DM6PR12MB4041:EE_ X-MS-Office365-Filtering-Correlation-Id: 13d8c89d-77c9-463b-efb6-08de62756d03 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|366016; X-Microsoft-Antispam-Message-Info: =?utf-8?B?STRNUFBvYmtYU0xVbjhwN3Q5N0tvbGNVUVp2L2pZN2hGMXZKd09rSjAveVdr?= =?utf-8?B?ejhHSVZTMXM4WlV0MkJzbDlzS0V0M1I3Y0ZGYVpCOUR0UnpHYnBtYllVRTNl?= =?utf-8?B?STRPSWFJaGNKdi9VMzdGZVZPeUNDeGxIaTQ4dVZCK0liNzlQc1JKeHgrcnFZ?= =?utf-8?B?UWlGb2YzUlVob1kwWDlOVDRqVi9lWGYrZ2NtT2RNNm5lVWhua3hJcDhIeGYx?= =?utf-8?B?dk01TVgraE5wS2JWaVJCbGxzdGtZb2wvNjhjYkEwUHV2VE9iRmU2QjFJN0s5?= =?utf-8?B?S3hwVXhnajQ4YUZ4d0E0QVdaVWtmVW9KSm91VjgzRWhaMExlRGlFbXlUUnlG?= =?utf-8?B?MFpmOGx6VUI4ajUzQXRHRVo2VjBtMUZkWHFXelFFOTU0ZzJvdkFJakxBUkND?= =?utf-8?B?SjduNGMxdHQyYTFkM3ZmRVhJd0pxQmtpSW16SkZhLzFON2hNWm55ZTZQcTA3?= =?utf-8?B?ZlpGU3VadnlLcUFjbUVjZ2o0ZEYxaG42QU1WcThLZ2pMQ3IwMERGZHFSRm16?= =?utf-8?B?VmI0aVhXaU1IRFVpampYVnc5akZQb3N6dk56MTdWMUZsZk9tV3RnYWlGSXRs?= =?utf-8?B?L2w0OVRwRnprTVljdVVhVkJON1ZtaFlSV0FlUXV4bGx4b0JrWElSVXBqUjQ5?= =?utf-8?B?R002eG9laUFETGw0WE9kOWR6aVZMWmo4QUE0bVYzSzgrZ3ZRRVEvUS9vNTk3?= =?utf-8?B?a3NyTE5hNXlLdElJWnJodDBySlJyRVNCcUIxREIwVlVhYTR6YUNpNEZoSnhs?= =?utf-8?B?VzZBWWFtdEN4NUEvaTZGNE4zR2lwVjh1RnZ1cGlHbHBKbUt4KzV3Y2RyTFhy?= =?utf-8?B?c0F6NHZVVGVubVFpMWlkUWovWk9kdDE4REhiZnJFM1EvUENpR1FqQUYwT3FU?= =?utf-8?B?SkNtNzhaUTdKcGtRaVFoY3Fid2FKZzYzR2ZzYWVYb2VZVGRnM2RKNTQzK3FO?= =?utf-8?B?clIwRTV3TzVZMWxndkhkbnB4K1hTNlpUMXdOb2ZoVmtnejlZRnV4dDZPY3k2?= =?utf-8?B?SkpkR0t2WDdwVGxJNHpuak9yZnZvV3hFaGRDWUY1WHo1dEZCRzhqRmNqVG1w?= =?utf-8?B?WDRUUURzcHNMNWYrQnl5alJlczhwMmJMeWFEcHRyRWV3NUZVT1Z3TWdkbWR1?= =?utf-8?B?RnMyOGhjUkU4UnNsd3RvTlVyU2ZwL2s3NU5JdncrenJ4NExMSi9odnZZOHlW?= =?utf-8?B?WERTclN0WFNvYldaY1FleVFZUStkQy81aVdDcjdOeVRvN05aeFhkb2txbjQ4?= =?utf-8?B?dHoxSlgxNlMzalprYVlBeUZPUi9xS1h2cmp2bTRRVkJtdndFdzdZMFJqMEtM?= =?utf-8?B?RmFWajBUYjR2Tlltb2dhVjRCRzJDb2g2Uk5uRHQySUM3MmwzVVVSTFI4NWZP?= =?utf-8?B?bmNSVUJRUk1nVzQ0UVpmUS9EaGJFdVdWdHoxdXhlVW45c0pvaGg5ZUtQSEZ3?= =?utf-8?B?TGc4UDZNcmxiSVZOUnFsTlZYUkJPLzlqU3J4MEF1b3ZKOHVoYjd6aldKazdQ?= =?utf-8?B?VVZWK2NIaXhqeGxHMWVMQ0dYUzBWVi9rSTh6OHRpRWVyN3B0ZEIzblcra0Jl?= =?utf-8?B?ZGR6K1hIbEUyeGtweVpGNVhSbU9ZdnV5UHNweGNEeHQxamlwODZFVVo1V1JK?= =?utf-8?B?L1FSSGI1OHZlQmRadTRkZlhXZ043MXZmTDkyU050aUpqVCs3cEl1VXl4TUlh?= =?utf-8?B?WHRtNGhiUVdUZUV2ck5IS0xiNVdGaDRaVVZKWUt4Y2pIeTYydUhabHVVRURY?= =?utf-8?B?c0doWWNYdm9jQXB3VDBLSHZJVlJEeXErbjZVK3JsdVFYbklYb2NvK1Z0UE5E?= =?utf-8?B?MXlIY1Y3Mm9mTDZvQ2xoVlpoUHg4cVJTU1h5b2xRa2phWDBLU2NlcnNHRGdF?= =?utf-8?B?eW1Rc1VlbUY4R29PaFhiOXZFbWQ3VktJU2JKQ3dnaExrb1h3UzVmSkRqY0xr?= =?utf-8?B?LzAzOXpjRFJTdHNLYWJBbytwTlc2WE01S1dGS2Q4UU5pbjNUbzY3NUYxTmRk?= =?utf-8?B?RmZ4cFBwM1k3N1dMakZNNmlKV1JCWEpPZENyNEFIOGJEK1ZOcjFCQXY4MTZL?= =?utf-8?B?NmpRM1RaYjVnRHA4V29kaE45Y2Q5aFk4N3lKTlhGK1poMVFheWNwVlh2RjN1?= =?utf-8?Q?vrtI=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM4PR12MB5070.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(376014)(366016);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?OTYrOUZGb2MzVjNRSWNvZHdjTEdBNXVCazNnRUxTWUJuTkpKNkhBUW85V2s2?= =?utf-8?B?ZDcwV2NIT0Fxbm5LbkM4dHpweU1PQ2huWEI2RUpDNHZKdEVab1dXVjEvbGdk?= =?utf-8?B?QUViNUJtRDd3NjZPa0VGUGcxanp5ekZiaVl3dWRQbU10M3hQS3hmcUxwYzRi?= =?utf-8?B?dnVVcE02LytWV0xZN1Ywa0FrNThLYlZvM0xSaFk2ZlF3ZjlvTUdiL3VmbStr?= =?utf-8?B?Q2xhcllyb2xEL3IyaTB2THlTeWk3eWdkUjlHMFpOL2NrTUR1NHpxdmJOdDda?= =?utf-8?B?V01lRG5PV1BtdGpkTlFyTWF5d2pqcjBYdjBTWTFIa2dubXpKY0ZnYk13UlNV?= =?utf-8?B?eDcyUUpEcksyKzEycWNZYVI2d1pQa2JnYytHRncvbVl4dnZ4bXJaSXhWbko4?= =?utf-8?B?dWk0QjkzSHhVRXRQbE5nNFpoby9QNUN2RDUyQlQyWGNiUDBJait0NHpzVTc0?= =?utf-8?B?TXRBRGdObWt3ajhIZWdudjBpczZTNU8xdE9PWjZyZFZMNVZkSW1hTTd0Wjlh?= =?utf-8?B?a2RtY1loYW1PMmZkdDdnWll6ZzVzQzhySjRCY1E2ZzBZV3NoazhVTUU3Zmtn?= =?utf-8?B?MmpNWk85S3BMZ0ZFTmtFanJJbmNsWDY0YWd4ZXk5T1l3Wi8wcG1jUXFVU050?= =?utf-8?B?MWtRcGpJM2Nsc3NVWkhSQytZSTEybnA4SFAzSkZDdTI1Z1dvTVFzUE1lUWNU?= =?utf-8?B?K2JUVjBxRzVYdVE5Vzh2N0JlNWhpRzNCN2VYbHUvZndEdnlOUjZjRCtPcFZm?= =?utf-8?B?M3RDZzRVeFNLbGZzRXY2TGhFUEZhUWVSSGJJem5FWHRUTndmMm04OXVWWnZj?= =?utf-8?B?LzlSVk14cjU5R3ZQelJaZzVDdGFZOVdlMkF6ejl0VUhpckl2YWFpUkxoZ3dy?= =?utf-8?B?QTdTeSsrengxZUlXcW0zUnVtSDVXM1BWU3dNTGRIeFpscktrNXVzeTdTRmNG?= =?utf-8?B?SU5BRHFCNHo0RUtxTWdRaHFDZGpZejlyNXY2ejFzY1BTN09OUkgrcHBXVDA3?= =?utf-8?B?TW1yVGZBSklSY05WQ2dKOWtkR1FaUGY3Sy9ncFVDMVJyRCt1ci9nVnBvM3Jj?= =?utf-8?B?R00ra25oTTVudlNodWlJUmUrOWhGbnUzNGF0MFNPeUtQdzB5T2xqS2RaYnVr?= =?utf-8?B?WWxUQTNGUk9oT3ZnSklENXpuT0tMeW9Wb1h0R1JEVTRFcVU2YXJERFFleHJo?= =?utf-8?B?MHp3N1plTFdpN08xdXByemNlS0JZWGVQaW9UNS9FaER3L2g3MXE3WnhBTUlL?= =?utf-8?B?OTFWa1RjeFIvZTQ1Q05aQnZ0VHRtakxaR0hRcm5kTXd6aDhUQ2N3RHJERnE0?= =?utf-8?B?UnBtUWN3c21NeWJiZEJpdm1HZUtpMVdrYWo2R0I0NTBhTHVsb0VxbG1wOGF5?= =?utf-8?B?MUVOb1JQWnRLV0R4NS9OOXJjU0dmN2NPYjNab2wwZ0lTK00xNzRZT3JPcGFP?= =?utf-8?B?TDltS0JQakl5ZEVvaTB5dHdoUG0zY01zdnluR0VmRTRwWm02U2FBbFpma29J?= =?utf-8?B?dktoMXArN21IemRBaU5LeUQ2dzRockp1M1Q2U2k0RXlObXVGT05BSVdoVm5h?= =?utf-8?B?Y1lQRTZaQTNkRzN4TCtUdTRPd0NRYlNnbkJMZHhkQXZsbUlQV1pwS29OZHRY?= =?utf-8?B?eG5pMW5uQ016ZVdGKzN5Yy9ua0lSZWZ5cjJKWUtrYUthZ1FnNEtlZ2R6Z1Y4?= =?utf-8?B?QWNXd09oazRMOEJIaXNVd1B3c0UrVXVYR05GeFZYRVMxL2kwd3MrbzBFOFRW?= =?utf-8?B?TGk0MmZFU0tCRXVKVjcwUThjS0ZsK3h5elhXeDJ3UlF2MnhkdG1XUGY3d0JW?= =?utf-8?B?TnVxVzJUL2JDdng3L2RBNExOamZrQW84OXFDS3V5bXE5WXhxL2FLaTNUSE8y?= =?utf-8?B?dkM1MHRkem5sTGV1VHV6VnFiODVnSHJRQ2J3V1U3MWNSMVlEQWZKM2h6TnF3?= =?utf-8?B?RjV6VXBpblZrMVhSNUhGYVF5Q3FRK3JnUHcvaWVVcUcwRzY4a2kzQ3hUVFlx?= =?utf-8?B?bzd0RVdaWWtQSHQ4ZzFpV0R3M1NHMTk3Z1p6TUpOYXIrZHV0ZUEvYkhjaHNu?= =?utf-8?B?OGhlS0p6QzgrdlhNMlNhRDUvczRGU1NGOEVucXIyZjZlb29ZdGRCQkZHUzJP?= =?utf-8?B?UTZHZUFzb2RmYnFnYVR3OHpLUzhqVkcwc056OTNhbUJhSkE3SHJnRDZwOHVh?= =?utf-8?B?ZDV4NXF6Q0hvaldyVXRqMjJPenFaYWFOR3ZuZTI1SUsza0UwK1lTQkxURG1R?= =?utf-8?B?cEpkemRnbExITk1ieVc4dmNXcEFxU0JDWDEwVFNwejlNMUpIc3kvRkJway9G?= =?utf-8?Q?NDU9wQk1oxr8EaElt8?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 13d8c89d-77c9-463b-efb6-08de62756d03 X-MS-Exchange-CrossTenant-AuthSource: DM4PR12MB5070.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Feb 2026 16:09:22.3632 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: jQv3VSIGv1M+XxhEbyarx0zWlXGWr1TavS0fz3MhAbx3mCqhp22SHgRh5wc7FD1wVgyMxk2Z+DolgOeaoqBaNA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4041 On 2/2/26 09:49, Borislav Petkov wrote: > On Mon, Feb 02, 2026 at 09:38:50AM -0600, Tom Lendacky wrote: >> I guess it really depends on the persons point of view. I agree that >> renaming the SNP_FEATURES_PRESENT to SNP_FEATURES_IMPL(EMENTED) would >> match up nicely with SNP_FEATURES_IMPL_REQ. Maybe that's all that is >> needed... > > I guess... > > I still think it would be useful to have a common place that says which things > in SEV_STATUS are supported and present in a guest, no? But I can see that getting stale because it isn't required to be updated for features that don't require an implementation in order for the guest to boot successfully. Whereas the SNP_FEATURES_IMPL_REQ is set with known values that require an implementation and all the reserved bits set. So it takes actual updating to get one of those features to work that are represented in that bitmap. > > Or are we going to dump that MSR like Joerg's patch from a while ago and > that'll tell us what the guest supports? That will tell us what the guest is running with, not what it can run with. Thanks, Tom > > Hmm. >