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Peter Anvin" , Thomas Gleixner , Kim Phillips Subject: [PATCH v4 1/2] x86/cpufeatures: Add "Allowed SEV Features" Feature Date: Wed, 5 Mar 2025 18:38:04 -0600 Message-ID: <20250306003806.1048517-2-kim.phillips@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250306003806.1048517-1-kim.phillips@amd.com> References: <20250306003806.1048517-1-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: MN1PEPF0000F0E3:EE_|DS7PR12MB8324:EE_ X-MS-Office365-Filtering-Correlation-Id: 725f1370-9550-46de-c95f-08dd5c4734be X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|1800799024|82310400026|36860700013; X-Microsoft-Antispam-Message-Info: OcR0GRW2vZUeTU44sXQfGmCeEVWEX2fpXp5voVk/TwZ4yomND5q/SCn2/HNc3SJGDPMnefZO/VG2Bg+DACqPa+LxXLFGPh9LtfEG2Ix9krDAXSr5b/+oTAAeC6/lyxA1YJvbsaROXmW5a/qonj0IycaZtNOvOLUPfw/vbyCBwzMaK9ePXZjw4fqAoA1S5KjGPphpTW2bZYanXTgTr/xMzbksFIP4RnOyrS/mZ6fK0dsNi1UqmlpffQupfJV3SmKSi9bpbW6aLVHbnItJLm8OFh2nI3JDrLpg9ouDpfvgh8tEGoABuBKZP4IAyVyHOgVf9NYbmztrcH0MAD/hzx287YL26e1uc9Q5G3eMnZWOj2jxvprhBJY5iHVxinsbYAdyNXo8mG/nEw3O5gt+zMXRGPfMIzo+Hnd7sLU7r8bOWV9qrRLN0JDR43IPmxT0/8WJng1pcQTHdMiUZbeGW7v2WKlItIuVIEQ3/R4M4U0e2qzzmgjm+D1Bci8DA4UcXipLEzplXe/PFssFaOEw9VSu/TcBAwEwyDUHcjoiYRo1PI4dJnQM8PcYejZo7JkTbpvPqDoAUUhwwKf3olPHHIf250fmksrqIvw/KbgaCJaxfdFGI9NRkEA+GUE2NlD6KIvLiY3E07aEIQKQfUD+TW9RsD5uYqnirXpHn5NiFBPjc8h+Se70yhUy4p9LGgytnzcYvOfVzz2RYJWwghfd0IlJScuBPIV0iyZZPm/8U9C7n3/19+EiPE6ZacBg40BXQbb7C49vJC58jqppMK57Rd24mqgKyCUu4dwKruuJhmM0NQkL5F5wiM32pI3aiIuTN1lSavK3JJmBS4m0TkB/rkjjgQDZ9Ki3eQS/Se0zSLjrHlSJFVu3zGtzgsWXyXE2n9oThTD2ArzcLiXKAzTUQiAoj8aHYR3SbI/epfbCRFNLn3QoVNicY5AEaCMICq83kjsRsuMfkMvrXCQc9Xi0n1b0jx8pZop+QxgxRGUyI+KTAhOQNGoWQZ1scgg9Q4PrIXr6fHeK41ikCMGRKRMu7+eusWNz+7ZwhjzrxNp6R2FAdrXO97y1ln1eoTDhz6Mqhs5Ui05W5Pn3omo/w1GSHrgieOGin24+Lj917P8PHs6vacHaPucj9wE6jokQiuKBsWyZroFk4AmjO5sqhsighNM+VslgdeBc1VSJi5o/qtJResLq942MnHWbSPYvYRtCp9piF2lwNS0ulk29xxRhQXg+DoTfyoWZcqJUjsIPuO8fKJRnMWZHtyO4zDJChF/NeDkY/eOLMv82OgrNfvPc4zeNlDCIJY4g44i9KNiahJY2Q6+LAvz+/NLEKLQOAX+R4DuiUi1tKqdi3DNJaJbdR3ecm1nQyD1cJdSLLXFcuNhUXJ0Li3+JhK7AoWMFllA7wuZneWkfWwSXMhqWULGqZybQFWe3XMrimpFvGnPv+aPZ1uph3q38x0OOIx80gjsGhyh8jOO3k+RXcCxqHSFr0E+PcWcoQZ7qVVROIkQso9Rtwec= 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)(7416014)(376014)(1800799024)(82310400026)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Mar 2025 00:38:25.3518 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 725f1370-9550-46de-c95f-08dd5c4734be 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: MN1PEPF0000F0E3.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB8324 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 Signed-off-by: Kim Phillips Reviewed-by: Pankaj Gupta Acked-by: Borislav Petkov (AMD) --- 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 */