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client-ip=165.204.84.17; helo=SATLEXMB03.amd.com; pr=C Received: from SATLEXMB03.amd.com (165.204.84.17) by CH3PEPF0000000D.mail.protection.outlook.com (10.167.244.43) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.9073.11 via Frontend Transport; Wed, 27 Aug 2025 13:58:30 +0000 Received: from Satlexmb09.amd.com (10.181.42.218) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Wed, 27 Aug 2025 08:58:30 -0500 Received: from SATLEXMB04.amd.com (10.181.40.145) by satlexmb09.amd.com (10.181.42.218) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.1748.10; Wed, 27 Aug 2025 06:58:30 -0700 Received: from [172.31.63.243] (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server id 15.1.2507.39 via Frontend Transport; Wed, 27 Aug 2025 08:58:29 -0500 Message-ID: Date: Wed, 27 Aug 2025 09:59:01 -0400 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/3] xen: rework xen_pv_domain() To: Juergen Gross , , CC: Boris Ostrovsky , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Stefano Stabellini , "Oleksandr Tyshchenko" , References: <20250826145608.10352-1-jgross@suse.com> <20250826145608.10352-2-jgross@suse.com> Content-Language: en-US From: Jason Andryuk In-Reply-To: <20250826145608.10352-2-jgross@suse.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PEPF0000000D:EE_|SJ2PR12MB9238:EE_ X-MS-Office365-Filtering-Correlation-Id: ceabcf71-b094-4b2c-13ac-08dde571cdfd X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|82310400026|36860700013|1800799024|7053199007; X-Microsoft-Antispam-Message-Info: =?utf-8?B?bC9PMG9kUXllMExxK1ErekZvcVVmdmIrZXFQWXNYR2JhR2RqdnEyT2lpb1V2?= =?utf-8?B?MUR2MXZzbTl2dnZidEpjSzhPMWtLNDFjYTZvbnQ4aVlnQitYU2xRNzBSc1h3?= =?utf-8?B?VHBkU01EMTBmeEhKRENtYU1BbC9wcXlKSnFzT0FkSHVRUEtwcW1SM09JOG9S?= =?utf-8?B?MjA4bjA5a0V0NzlXMHI3OEFsZWVvVWpHeW1zcXBkRzlpNGJpU05uQWcxVUZC?= =?utf-8?B?aFJ2K2IxOXcwQ3JETkdobDhxVGVkT2hvT0Q4ck5wVm9VV0R0eTEvUzc5WnVC?= =?utf-8?B?UVlXQ2N0VXUrbnlZQ3l4L08rZ0RCQ2o3TjdVd0xvLyt6ckM2elRuZ2ZBbUM0?= =?utf-8?B?WEl3NFR2TUVzM2JDWUZWTE91b1p5aTJYK1Y0Y3g4N04vRUU1UGpCQytLbzZu?= =?utf-8?B?MzN5ZHN1UWZaSjlNWk5Oa1dEUmFtblBYN1NqcmUvcmkrSWd5bjJHN251R2p5?= =?utf-8?B?QjFLSmJDTDNpQ3htVmFoV0tOWGM2Y0ttdktVK0FDTllJcmYzcGFFMzhTYUlm?= =?utf-8?B?SFZWZVdLYlFBcnlhcmx3bHRXcTVqRzJISjNKb3JBNC9UeGVMcll0MUlVRFRt?= =?utf-8?B?RVBqNjBHV1VSY0ZCa3BuYnhsZ0NOUEhIb0lwY015T1BHdFlJc3RKZ1MreEx5?= =?utf-8?B?L0taUnB4SVVyc1ZiWXZhSStSVThMUGsyV09UNjN6YlRTK3dGUENpRTlmKzR6?= =?utf-8?B?cTA2SHdPNmE3ZmFGRkNaVnBValN0TE9oT3p6SllZbDRKSHFmNllaaXVUek5L?= =?utf-8?B?d0NCaFFFanB5WUlKNXlrNGRndE1udWtCQVRZU0JJNnBJd2xBWTZIVUFBUnZo?= =?utf-8?B?d0s3c3pRRWwzRXUwSEtIQ0FvZTVZOTZzRWVwY25ETlFjamdyelE5dDBsQnhZ?= =?utf-8?B?YTc2emk4VWlvN2RSemtqZHUvZUUyenE4RHZjMENmRzdnVTZjNkFhSldmVk5M?= =?utf-8?B?RkQ4U1JRVmEzTWl5Z0N5eDUyeFhDNFFMZlR0WlpGYVFTU2o3OVNncXpiQ1NI?= =?utf-8?B?UUFRMFh0bXZHZkdMdUNMVlB1R2JlZlVRT3BGbGNmd3JVejRTL3F4SkU2Q2ZH?= =?utf-8?B?aEJxZ3JiSkhjUVZHOTBvNjhnR1VpQTlSMkpSL1lzZy9lZlFPNGdwMnk0czJL?= =?utf-8?B?ZGdjYzNsUzFZZEtoNm1YZyt2U0V2TDNEbERJckFoS1RqY0ZVc2ROQ1RwemMy?= =?utf-8?B?L1BDQ09EVGVKek92ZjE5ZnlFMlJjazJ4RkREb1R5OUt4VVRWYndib3dHVW1z?= =?utf-8?B?WWZ6TGo2RTVra3JSK1Jrb3N5MFVhWUs2NDdGYUJud1VkNmxaaGtpWDhJM2ZC?= =?utf-8?B?bWo3NlI0eUoxbWoxVkpHMUxuV0cvSXdoOW5YOGEvWXFtM1RQK3lodjg4STg3?= =?utf-8?B?dEdTY0luZWhvOXBMNlVqY29FSGNBeTlQMTVINmlFNEl6MmJGTmY3ZFRxc2hs?= =?utf-8?B?eTBLaXpzdyttK2psZDFxdU5BbTBzY29pTnZZTVNlbTA1SUc5a1NhU1F6aUZ2?= =?utf-8?B?QzBUbW1KUm9hZ0RkOEwyTDRMY0xKd2dVcEwwSXpneXhUbTNEMkIxOW9VZEVi?= =?utf-8?B?d1JrZ3MydUhNWUFpQnh6Z3ZMRFZ6aDVSQmEyeEJVQXJGUVNzVDQvRzBURG91?= =?utf-8?B?VnpkdDZ1eWpaaUMvazlwNG1abHo2dWg1MVpTWTdXdWN6ZTRqc09qbXBsQlhZ?= =?utf-8?B?N3Bic3FVMjZTT2gwWUhGbTYxckIrRWFNbENBR2hEb2FyN0ptZ2M4cjZDenlM?= =?utf-8?B?UTFyYUx0dUhtay9ib2xZeDN4T3RZM05ZdHgvZENibFFuc0dEOHlvV0JnVlhR?= =?utf-8?B?OEtNVTJNcjhGeE05dFM3bzM5aVM3anBTdWZlSEU3aTJkZ1lOakFyUE5PVTg4?= =?utf-8?B?ZTBQZXAxeDVmdDU4eW0wVEFGelp1THdXNW16ZUphTnVuWmtBZloyaENkVEl3?= =?utf-8?B?UlVVTmdhS3BicHI2TFkvWmdPR0FkR05YMCtUeFJFN2NzSGgxTThEL2xGSFdr?= =?utf-8?B?cVNKNm5teHVUSHlGdElkSkk2RUFWdUJIRzE3SjI5S0RKTHp1VkNpdTVJY1FO?= =?utf-8?Q?dPB1zL?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(376014)(7416014)(82310400026)(36860700013)(1800799024)(7053199007);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Aug 2025 13:58:30.5853 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ceabcf71-b094-4b2c-13ac-08dde571cdfd 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=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH3PEPF0000000D.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB9238 On 2025-08-26 10:56, Juergen Gross wrote: > Rework xen_pv_domain() to no longer use the xen_domain_type variable, > but the artificial X86_FEATURE_XENPV cpu feature. > > On non-x86 architectures xen_pv_domain() can be defined as "0". > > This has the advantage that a kernel not built with CONFIG_XEN_PV > will be smaller due to dead code elimination. > > Set the X86_FEATURE_XENPV feature very early, as xen_pv_domain() is > used rather early, too. > > Signed-off-by: Juergen Gross Reviewed-by: Jason Andryuk