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Tue, 6 Jan 2026 03:24:29 +0000 From: Date: Mon, 5 Jan 2026 19:24:27 -0800 To: Dave Hansen , , "Lange, Jon" CC: Sean Christopherson , Paolo Bonzini , , Will Deacon , Mark Rutland , "linux-coco@lists.linux.dev" , LKML , "Kirill A. Shutemov" , "Edgecombe, Rick P" , Andrew Cooper Message-ID: <695c806beb4d7_4b7a10080@dwillia2-mobl4.notmuch> In-Reply-To: <71f42b9e-793b-4f8d-8159-a6ca7800f292@intel.com> References: <695c50eee68e3_4b7a100e8@dwillia2-mobl4.notmuch> <71f42b9e-793b-4f8d-8159-a6ca7800f292@intel.com> Subject: Re: "Paravisor" Feature Enumeration Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SJ0PR13CA0135.namprd13.prod.outlook.com (2603:10b6:a03:2c6::20) To PH8PR11MB8107.namprd11.prod.outlook.com (2603:10b6:510:256::6) 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: PH8PR11MB8107:EE_|SJ1PR11MB6226:EE_ X-MS-Office365-Filtering-Correlation-Id: ceeca9ea-14fe-42af-1367-08de4cd31a34 X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|7416014|366016; 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This approach > >> could obviously be extended to paravisor features, but it would probably > >> be on the slow side to do it for each new feature. > > > > "Slow" as in standardization time? > > Yes. That speed problem is mitigated by the EFI/ACPI Code First process. Linux and any other impacted implementation that want to be party to a new mechanism just come to a public agreement on the mailing lists per usual and ACPI Working Group acks/naks that public proposal. That effectively gets you in the same ballpark of time as landing a new invented Linux enumeration upstream. There is a lag between the ack and the spec release, but the intention is the ack means it is safe to assume a future version of the specification will adopt the change.