From patchwork Mon Mar 10 20:16:02 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kim Phillips X-Patchwork-Id: 14010639 Received: from NAM04-MW2-obe.outbound.protection.outlook.com (mail-mw2nam04on2067.outbound.protection.outlook.com [40.107.101.67]) (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 804B91DF248; Mon, 10 Mar 2025 20:16:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.101.67 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741637794; cv=fail; b=Zrnw1zDmxHACNGNgkPyan7B67duNtZ6Muw9FFbzDGSXHe+Q6RuAUnluF7PxzY/cBunf+i/DRdPZ5B0aVfy3NuvTo9bOxY3GjKEQ/eBe5K3U8V0fcD4QURxaDY8oM9XpcFj6UpgwD0ou8SI5pbDC712rTwTnDv7z390WjoT2KsA4= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741637794; c=relaxed/simple; bh=dcgDJ3YMDC+Lbo2y8aYvkeoZH0t/Hymt+iHU7cc14GM=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=vC9lFg8yKA+cK1c1b8d3yZaxe6C4R12vS72XOBKOKLnUGZyO9CN4jCmElZm91f3dvMu1zy+UObrAYcIa5mx3gB/JA3eL7KvVJvvmnNKXEOUK8Nc+O3Ooa+6dhO7bpjkdzT7heqxyMKf9b6h/VEMv+hCX0JLfHMOtv0nkthvUWyM= 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=z+vSz7/C; arc=fail smtp.client-ip=40.107.101.67 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="z+vSz7/C" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=ST5o8y8WT1CpGw/VDk/VDoX87x/91nhnYwpqKBKwIlYqZac2pDiOw6y0qu9ehuM3a4AeIKqj+42dFap9CaJaY/AK0pRpaOImFXKMbAuHO9QdVlc9IYlHVhHkNPkki+hXMXBYDfqtu6lxFkxF5HJZNPjfIdnL4uwunnFvr9H4SuAArcCiAcbz5o5J5FStfDQ++tjZo9VX0tou5YW/c7ohnH5pIDRmiyQhpnqfGYCBUzbpPvy0U1fdnUXtmf0ehbvdMZvdhWt/opkbn3r+CGvgaNcSToMoWwzWgbz8e6Pe174ifrnRVJP5JvqIcCE98DPTBLW7SNBp8dkdnzPTrNsenA== 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=TQulctxDXCTHyvy5KXTMqNj7eqStByMkHS9kC8yAaj0=; b=MrBnmBUf7sUSA3CBKTwpKWEo5jGo8PAdjiFMC2+bXGjsocKScJtxUp3PanVSdcecJSymPUjBXQpjo3XfFeqXqpborelPlVPPGHZlRlSFEB3qRW0KXkt7y/KDQNR4eS0cX953Y6HpVZjE8Y8muf3ho4c1ENHmgEWmMntTbL7tGB9grn83AKp75SYy6q8U/PEZK7d1+Iowv0GdusvWFA+pIGWrYomEKlyLXBJ4aZAtfQhWWVlruNuZOQW9RkFsNkSbzEfk1RSof9P7vLrsqDKukYY6qNXoyy5YwJzSHB7jAAb0I/AwwIjn38XYlJYPdrFYyZdjQR3g+uAgeLzFIZZ96w== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=vger.kernel.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) 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=TQulctxDXCTHyvy5KXTMqNj7eqStByMkHS9kC8yAaj0=; b=z+vSz7/CQBUV9NEbaIwtz80t6U44j4bOp1gNnCfFOOe1ICRn3U/K8fBBRGKSOW4zmQrB4BxtyEZTXxfeaVcRng9E6IFR0gJdVbVl9Ll2SSZxctw47IB811vByvSHCrvdWM5ZOHAAHvJ8YRzG0dhUIkzrXQfCGqqO6CfECZ1ckvA= Received: from BN9PR03CA0122.namprd03.prod.outlook.com (2603:10b6:408:fe::7) by IA0PR12MB9045.namprd12.prod.outlook.com (2603:10b6:208:406::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8511.27; Mon, 10 Mar 2025 20:16:28 +0000 Received: from BL6PEPF00020E65.namprd04.prod.outlook.com (2603:10b6:408:fe:cafe::b2) by BN9PR03CA0122.outlook.office365.com (2603:10b6:408:fe::7) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8511.26 via Frontend Transport; Mon, 10 Mar 2025 20:16:28 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BL6PEPF00020E65.mail.protection.outlook.com (10.167.249.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8534.20 via Frontend Transport; Mon, 10 Mar 2025 20:16:28 +0000 Received: from zweier.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Mon, 10 Mar 2025 15:16:26 -0500 From: Kim Phillips To: , , CC: Tom Lendacky , Michael Roth , Ashish Kalra , "Nikunj A . Dadhania" , Neeraj Upadhyay , "Naveen N Rao" , Alexey Kardashevskiy , "Borislav Petkov" , Dave Hansen , "Sean Christopherson" , Paolo Bonzini , "Ingo Molnar" , "H. Peter Anvin" , Thomas Gleixner Subject: [PATCH v5 1/2] x86/cpufeatures: Add "Allowed SEV Features" Feature Date: Mon, 10 Mar 2025 15:16:02 -0500 Message-ID: <20250310201603.1217954-2-kim.phillips@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250310201603.1217954-1-kim.phillips@amd.com> References: <20250310201603.1217954-1-kim.phillips@amd.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF00020E65:EE_|IA0PR12MB9045:EE_ X-MS-Office365-Filtering-Correlation-Id: 8525db51-a3f2-4891-f065-08dd601070b3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|376014|7416014|36860700013|1800799024; X-Microsoft-Antispam-Message-Info: jgQNYVipWq4EfILsKLh0tI14G4nRuIgUHO+CSrZySjzDLIgQXHDM8J8gjfVLpq8UyFWt1QU+F0c715HSYa9DtuMX6ofLM949/eT395kEMkCsSfuxeYg7a/5OEpnPAwCS5nGhfUP7tzaTfITrk8giysIOaRg70HhaaRBiD/GkUeXgebvYacZ27UeRWtQL1DmADh4CL4nyLrvDK4i2/4e3HJNASR1IsmhAjmFpNIhJzGK8Y5/UwR9ZSpA4u7bC4wYR+RYlHx6rhjuTxd/4Nc0Vz04cbiwaiYOdGIpiFrcamAsnJYxLHgx1aIhnVEQiXngsUCO6YIkJhlallFWXDTBEmqY5rlGE+r3LXTLZcUnzZgTaZbs05AeOUZdCTumNQzy1lsgDwnxBJjZeNmReMQYz25hW4L5TjG2yTMjPc18fqX9Ud7KW7rjmJf9JYUeO+OMjl5CQCLZlfciZyVt7rg8rxBPOlsdmyaS+J+5i+ABv7ProewIE+bLisfwsd9CHO7tFnXct5TSUiJCL/T8HFiKzmLaGiH8gSIMiC8iOZoYny/mxTH99R4ka4Kwbl/536PmElXV5fhY761T4jke8RWu26hzadw71VPZ1LEtKSHxYiq8rGQeo4qgbx4Lkdy6FSSM9skDgPtivPXMZy24Nun2QLB9ynRbyQsPoOJ6ibqhTVnMh96eqT7tqTnWc1szW8+aHxquI7GvzixsIU8YqF2ELqW51TdFAhUUGWYdOIE4YmRErBpqXAKbGbLtA32RdnKIIYivulzPOoBfgvxItJd+gwdMBBF4TvZwyo94/WHMMYS4cyA15K/IujChhi954t8CjjID7doVcSAkoLQA77OpBK10/zQp8nHQP9wNSnRKbEdQMHVTnL4wdmAgZNJF5J/YWnj3ZSYL8cwOdD1OLOO7tWf0uZ6RZcGilUDkvLLhC+QwvEVHNBHVZAFglnD53KOIbphVV0VtPwauu9PrHot3j+dAPafncGo6KiOdFhnpjfx4trGeM+zmzLQ75DiuGAd+2sOJC757dN84j8p6ljOtHPcjKo53qRakXtFk0/rGX/bEjFkS+DfdENHHvB1I9nqWmzHA/8cMkG0ZFhNScCLCtSTxdI+O9wGv9Z4Djy51lUDLoZNkkyWxoFAH1HHQy9mTEYhPcT+d/02eLdKvdkFpPOvVfsL1QHKGqlhETUxvIUlDhEXkciOzSsqVppYYie0DvwJdbMc3FcjCcC3Mi6AOwBYBthss/LYgSM1ppyBNv65dhCTteSQojw/JCHSKCl57nmsnywM20t4hwx52o2ysF24KpwqCXr9Czz6nIywWRDD8f17gVSVqGwxNaocCe4gy8g+6kQIuAvshO6mwAnQS5XVLMeyEnIpud8SEyofXUhQwrIIn4Ev05+HNVoLn4/BeWp/mh2ZKFEp24eJAXpoiN67StZUdpix54jwSEAJdvcNHSTfOSUCF3+oUwstsQ93L1HagmfgAKwT3GJssDVA41lycn3VwmAON6gfidZz2dwxs= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(82310400026)(376014)(7416014)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Mar 2025 20:16:28.2593 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8525db51-a3f2-4891-f065-08dd601070b3 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF00020E65.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB9045 From: Kishon Vijay Abraham I Add CPU feature detection for "Allowed SEV Features" to allow the Hypervisor to enforce that SEV-ES and SEV-SNP guest VMs cannot enable features (via SEV_FEATURES) that the Hypervisor does not support or wish to be enabled. Signed-off-by: Kishon Vijay Abraham I Reviewed-by: Tom Lendacky Reviewed-by: Pankaj Gupta Acked-by: Borislav Petkov (AMD) Signed-off-by: Kim Phillips --- arch/x86/include/asm/cpufeatures.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index 8f8aaf94dc00..6a12c8c48bd2 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -454,6 +454,7 @@ #define X86_FEATURE_DEBUG_SWAP (19*32+14) /* "debug_swap" SEV-ES full debug state swap support */ #define X86_FEATURE_RMPREAD (19*32+21) /* RMPREAD instruction */ #define X86_FEATURE_SEGMENTED_RMP (19*32+23) /* Segmented RMP support */ +#define X86_FEATURE_ALLOWED_SEV_FEATURES (19*32+27) /* Allowed SEV Features */ #define X86_FEATURE_SVSM (19*32+28) /* "svsm" SVSM present */ #define X86_FEATURE_HV_INUSE_WR_ALLOWED (19*32+30) /* Allow Write to in-use hypervisor-owned pages */