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Peter Anvin" CC: , Brendan Jackman , Derek Manwaring Subject: [PATCH v4 19/36] x86/Kconfig: Arch attack vector support Date: Mon, 10 Mar 2025 11:40:06 -0500 Message-ID: <20250310164023.779191-20-david.kaplan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250310164023.779191-1-david.kaplan@amd.com> References: <20250310164023.779191-1-david.kaplan@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: BL6PEPF00022574:EE_|SN7PR12MB8436:EE_ X-MS-Office365-Filtering-Correlation-Id: 1d6ec2b5-c083-480e-d791-08dd5ff2550d 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: =?us-ascii?Q?XPpx9G+SX6C0vjVa2bA/2zLhcMiEszxz7VQiiwowVaC5iFkm4HozscdTZFps?= =?us-ascii?Q?ZwcpZDwtjKJkX9sP/sTkRC9ZY7SfyZeItiRQ1gen4gKYcyFLtxOf2kYQ76Z8?= =?us-ascii?Q?UltyeGvd/SiGPhlczv7tS5+Qs0n79ks2L7ZXddR81awGfpZtMl4HqJTNn8Hq?= =?us-ascii?Q?+obrFO4PuFxfLoU9AJu/t0a9dYVx15ik3op7dTNsAP7LdST1YuHPp5yvv774?= =?us-ascii?Q?C+RsSj1dbZt4cwwK39L7sWwv9ww7z+wqp3/YU4rfTEZOHlo7sT+/THOYqro4?= =?us-ascii?Q?EN/uHMVV3VhivcurMqqwYxPjdypHkWs6vniHIMHq4oyU+elu2I3uKjpnusty?= =?us-ascii?Q?e8GrQGMK7ZKfOtVptr0LdWlsYfUIUM0fK9YC2LEr3gFgH5ygY+73HaxsVseo?= =?us-ascii?Q?4M5beOw7QUQfLFluMUpeKETMaRU2WRoTSff8fELuN2Ko+KHa0i36/XfvHYWp?= =?us-ascii?Q?9ZhaSiaZVbRuI41+Jq0lb+3uHT/2ObdRWjIdv27CaB0vCpiiJzqttbRhrWAw?= =?us-ascii?Q?n6jtd8fmfdh+MaZkOE7jUQ9non2Y9Jgd2+xTFbcdSiG1/Ak2hHz7HpjKjPts?= =?us-ascii?Q?kPeIlLNFRzd85K9ClXrQtkN6dLsRXWcEE7oio0gnbCwQvbxIPG1FvXfShMXU?= =?us-ascii?Q?Kkl0i9qHgBKsCd6xYr8PEOYGouYlIG7Qs8zBP/XAuPg31XzYsjBcIqASrGCE?= =?us-ascii?Q?KwEexlQFusCOAUT4OQZrColetGD4XTg7ijg4i3WhaHfOO03AjdCZUhEOh1HD?= =?us-ascii?Q?0iwBoaUKhBeragLUbY/8b1uPPXa8CXRmWcaMqdva2UHlfouzZlBPcsyvOzKe?= =?us-ascii?Q?OxEZknnaeZc4xzJgRV1KVjmp0uiX9Rbtkr/AtySXh5Or1BdpzUmdAb245/AY?= =?us-ascii?Q?81MBthtu94T6RKeVSW25ZxLtTdWHlxefK4/oUY8Hd3Cg+k+eu4ThgVv/n1n8?= =?us-ascii?Q?fdYNzaJTZJIlcsoDQ1jtXw5mCaDhgltRCXdOgogBsh9DbIIjg2nlsZvaQ03l?= =?us-ascii?Q?E6ruaf/oIFXEFvwaVstIqJiIl7QnZTzEVeZYI8fUFMAU/tY4HmbvL3DuTeTj?= =?us-ascii?Q?rdjZf2eXCFRS3/O2ZWiaq5L51+C5z0GMI7nu1bFn09Aag9q+YC6lAekZ7WOw?= =?us-ascii?Q?89DxH77zvD+xbokLCc/tBi4lfJC+DwLxSlqD2Uao+AidbvHEspLrRVNeo4PP?= =?us-ascii?Q?hARmbCM9YfAPAyNrBHM6jGvAHEwMJ/L+w7bFDg56B6C9aksvOf8YYJgvYWtR?= =?us-ascii?Q?YtB+5GEL46miWbj/E2dgf3LhDAkRwlLITEwTeRD0MppSRAXcSi7KM1Qur2hX?= =?us-ascii?Q?7Q+CaHIaEI+RRO35yO5mwRdu1luqPQym2gc4AF0to1mpsMbJlCVuVeM+nCsT?= =?us-ascii?Q?HRCYsbYg0BrgdCbcOyfZLnwFqyxnNOsToIn2aKWve5g+k1q0OAgfc1gCaOUB?= =?us-ascii?Q?9Xjj0XqqPb1IYo/sbXhLT1uY3gMz2xXdOqT57YxGXRLRkfLTeLgxrw=3D=3D?= 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 16:40:56.9704 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1d6ec2b5-c083-480e-d791-08dd5ff2550d 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: BL6PEPF00022574.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB8436 Content-Type: text/plain; charset="utf-8" ARCH_HAS_CPU_ATTACK_VECTORS should be set for architectures which implement the new attack-vector based controls for CPU mitigations. If an arch does not support attack-vector based controls then an attempt to use them results in a warning. Signed-off-by: David Kaplan --- arch/Kconfig | 3 +++ arch/x86/Kconfig | 1 + 2 files changed, 4 insertions(+) diff --git a/arch/Kconfig b/arch/Kconfig index 9f6eb09ef12d..cfa65367a08b 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -1748,4 +1748,7 @@ config ARCH_WANTS_PRE_LINK_VMLINUX An architecture can select this if it provides arch//tools/Makefi= le with .arch.vmlinux.o target to be linked into vmlinux. =20 +config ARCH_HAS_CPU_ATTACK_VECTORS + bool + endmenu diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 1665ebaba251..cb1c03021683 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -72,6 +72,7 @@ config X86 select ARCH_ENABLE_SPLIT_PMD_PTLOCK if (PGTABLE_LEVELS > 2) && (X86_64 ||= X86_PAE) select ARCH_ENABLE_THP_MIGRATION if X86_64 && TRANSPARENT_HUGEPAGE select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI + select ARCH_HAS_CPU_ATTACK_VECTORS if CPU_MITIGATIONS select ARCH_HAS_CACHE_LINE_SIZE select ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION select ARCH_HAS_CPU_FINALIZE_INIT --=20 2.34.1