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Peter Anvin" , , References: <20260715224030.3772948-1-jmattson@google.com> Content-Language: en-US From: "Nikunj A. Dadhania" In-Reply-To: <20260715224030.3772948-1-jmattson@google.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF00029928:EE_|CH3PR12MB7641:EE_ X-MS-Office365-Filtering-Correlation-Id: 1979e43d-daf8-4e4f-35b8-08dee3119248 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|23010399003|82310400026|36860700016|7416014|11063799006|56012099006|6133799003|18002099003|22082099003|3023799007|10067099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb08.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(1800799024)(376014)(23010399003)(82310400026)(36860700016)(7416014)(11063799006)(56012099006)(6133799003)(18002099003)(22082099003)(3023799007)(10067099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: W+a9leY5a/pqthBugist6pGKMGvModpE2UeZ+gNID1v9o6ES8WKpYqD9ebt5P9DvZqk4q8OF0w0ptv4xDeKS5dA4wE6AehtKObDp8ZjDBMuwpQVrkE2O81smKvGLSu8NNJWjx4aiwpKjk3+nAyAEEBRi/fekRjnQT6AkffO+qorCCm6UX0DibW9OPy6GvipeXKpeWgVVfvc4ysOkvXQmI7Cw7Gakc8/dz1iKC91IxPJG2NZJMx169poJ8Yyr1FPzFzsDhrBfbSpsxau0gpWjh43j/Bki6LNQ0qlf4YBQE+2LWC+UCNpt3YwuFOX2T/Y3xbyhmnSqPV/ez8To81EErqjD2aPkPPcRCVTiBbl1uCo7CodDd4j4wJipVIVtsbs8fCZZ11iw3oh1EWKD0D6CqK01eDDGUVOyQXKG5JHplB3+4NE2mgp2ZIIchEWzFlMm X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jul 2026 08:09:34.0989 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1979e43d-daf8-4e4f-35b8-08dee3119248 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=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF00029928.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB7641 On 7/16/2026 4:10 AM, Jim Mattson wrote: > Add an explicit dependency between X86_FEATURE_AVX512_BMM and > X86_FEATURE_AVX512F in the CPUID dependency table. > > AVX512 Bit Matrix Multiply (BMM) instructions operate on vector registers > and require AVX512 Foundation support. Declaring this dependency ensures > that if AVX512F is disabled (e.g. via clearcpuid or host capabilities), > AVX512_BMM will be automatically cleared as well. > > Fixes: de0bfdc7137d ("KVM: x86: Advertise AVX512 Bit Matrix Multiply (BMM) to userspace") > Signed-off-by: Jim Mattson Reviewed-by: Nikunj A Dadhania