Received-SPF: pass (google.com: domain of linux-kernel+bounces-19680-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.199.223 as permitted sender) client-ip=147.75.199.223;
From: "Zhang, Rui" <rui.zhang@intel.com>
To: "tglx@linutronix.de" <tglx@linutronix.de>, "linux-kernel@vger.kernel.org"
	<linux-kernel@vger.kernel.org>
CC: "jgross@suse.com" <jgross@suse.com>, "mikelley@microsoft.com"
	<mikelley@microsoft.com>, "arjan@linux.intel.com" <arjan@linux.intel.com>,
	"kprateek.nayak@amd.com" <kprateek.nayak@amd.com>, "x86@kernel.org"
	<x86@kernel.org>, "kan.liang@linux.intel.com" <kan.liang@linux.intel.com>,
	"thomas.lendacky@amd.com" <thomas.lendacky@amd.com>, "ray.huang@amd.com"
	<ray.huang@amd.com>, "andrew.cooper3@citrix.com" <andrew.cooper3@citrix.com>,
	"Sivanich, Dimitri" <dimitri.sivanich@hpe.com>, "paulmck@kernel.org"
	<paulmck@kernel.org>, "Mehta, Sohil" <sohil.mehta@intel.com>,
	"andy@infradead.org" <andy@infradead.org>, "Tang, Feng" <feng.tang@intel.com>
Subject: Re: [patch 37/53] x86/cpu: Detect real BSP on crash kernels
Thread-Topic: [patch 37/53] x86/cpu: Detect real BSP on crash kernels
Thread-Index: AQHaQjyCF3Nt+9p0tkSkWmDSuvApOA==
Date: Mon, 8 Jan 2024 14:11:01 +0000
Message-ID: <7443f3200ef0be756566059e8c9b0657f3cefcff.camel@intel.com>
References: <20230807130108.853357011@linutronix.de>
	 <20230807135028.381851690@linutronix.de>
In-Reply-To: <20230807135028.381851690@linutronix.de>
Accept-Language: en-US
Content-Language: en-US
user-agent: Evolution 3.44.4-0ubuntu2 
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?utf-8?B?ZEhDRUlLdHp6SnVNaTM1YWRVWTdyakN5bDhnL0s0dFdxMENmL21xNElQV2xu?=
 =?utf-8?B?UXBsWW9wZ2phaC9CL0FEN05BcDRsNXVwNjNacTNEYkhDUFlOUDJwU2J0emlY?=
 =?utf-8?B?MlNoaFhqMXROMDhuZUNKejVyZ0kvWld0RnloMkYydTgzSXZKYmg1ZVVzeitU?=
 =?utf-8?B?VVBNSEJuRUtoWVlqYTRKa21iT1JpRDU4MFVHSHNsd3hIQmVvUEdrUStWaXl2?=
 =?utf-8?B?VTlmVDVHSDFVbzR1ck9NYmIrbnNRMy8rSXRaNTJYVzBlZXFTWktraTg1UVl3?=
 =?utf-8?B?UlVsVHl6dWo2V3hIc2toRmg5a3ROdWJRMm9LZFZMSWJaM1ZkNGt4VGhSVExF?=
 =?utf-8?B?TEdkZEx3ZlpRVE5CenZXUVlWWml4UHBjbmRjZ3I0aDR5Qmp5MDBRWGw1blJ4?=
 =?utf-8?B?QjZsOE44SVFLaEFhT2xMR3cxQkpiVHN3ZDNvS3dGbkt4NkRzL1FhSDE5UmVa?=
 =?utf-8?B?ZWxEWlhDMG1TYkx4RVBMN2FoWFg4eHdyM0liV3h1WjlLUHFXMGc3b3h2cFhH?=
 =?utf-8?B?M0dRODFBQVBNZjR6KzFXYXFsdDlZbWJCK21PczJDUlIvM2NKUnBncGprMDY4?=
 =?utf-8?B?cnkzUzhiUllIOXc1a3p0UkZ3TzhGd3BuNHJQUzdPVmNvajZwMXllZ3pDY1Br?=
 =?utf-8?B?NFdwU0lKMVI5eE91TSsrWmJ0RldyQ0pKcVlvT3M1c2NUNHBUU3FnRWZxM05a?=
 =?utf-8?B?TGs4THJmUFpxeTh6Sy9JT085S2J2Q1ZSQVdIWEFKdHZhNm5aaHRwK1l5bkRj?=
 =?utf-8?B?c05tLzYyUjZvOSt0WjBzeGhsU3dRaytHUGczd3NRRkNYdGpuVytIclhlU2pL?=
 =?utf-8?B?NlhydEZZZzNheEtRR1RlV1I0L2VjNitwTGtiRUNjcGFBaTRudGluaHZobWdm?=
 =?utf-8?B?cUY2WU1HcHlwOVNWZTg3bjhwTGU1VGtvRGV2SElWWWlnMmxyTWVValNab2Vv?=
 =?utf-8?B?UjdjQksvbzhaa3ErMksrK3lwLzNPbUo2bVN1S3NFZkcyWUo4SFJObFdqSktK?=
 =?utf-8?B?UEh2QURkbCtYNkhCemdxWWpGdzZ3K0VDMVk2bnB4WjNLWnNWK05zNlhjSWk5?=
 =?utf-8?B?aUFLS3VLeFY3UlFSNE45NitoK1VDeXF6QkpXYzhrWFlRaUVub0lJMG9XWHdw?=
 =?utf-8?B?bXI1bFlIZnhESko5SWdROHRoOWxSM1dvUFBxSFBUQmxUZC9MMld4Lzd3R2lO?=
 =?utf-8?B?aWYwa1NVSnVGTWhmdjRydnY5dlpYbFdKcHNWdTNYVldQaTVlTVJXaG9oMlNE?=
 =?utf-8?B?d0VEbzdobHVtc3hwbWxwUUNsdERsN3dVc2E0emprV0RjZ3pxK1VDSWpvaTRS?=
 =?utf-8?B?R2RodDgzV20yWFF3bm92OHZNVXFQWEN3bzZtbEcyUzdGNlU2ZVl5bkxvMXB5?=
 =?utf-8?B?MU5PUm1ZRVp1Ukt6KzYvd0poVmhVSzBuaklFZHVLLzYzV0FicEd1Slo1dFR3?=
 =?utf-8?B?blRlUE9xRjduZHhxUnFxSlJ1dksyY1hHNXpUcW5DN2dtdzFwOTM4cHY1Z2dZ?=
 =?utf-8?B?NS9WbWE4S0NrSFRuOEN4cnBtVUxub2dIdnlXWWRJTDZiS25IMmU5bFBSTDlp?=
 =?utf-8?B?TjBJUDV3ZFhYUWtuZ0RocnRPYkpZeWdVV1hxMVh5TkVtN3AyYW0weUN1Misv?=
 =?utf-8?B?Y0kwRTBHeHBjMW1TSXVPa3E3UkZmWFZIMWFUazVQSEpMeEE5b3lXUWRkZ2sv?=
 =?utf-8?B?UXgzd2k3V3ErcC9qS3ZwR0lTK0dQTEpFUkxTQXgrV25hREg3RE5pVDFGN25u?=
 =?utf-8?B?NnR0cTAzRkJqVGExNkZ5TDhDUXRYaUNXTWFqRTV5K2grQitIdjF3WlBHMlAx?=
 =?utf-8?B?NC9BWGtzVUU0ZmRWZVJRbmlNQWtXOTFKbnRQN2hrOUFqUDJ0VUFkRmdyNUI4?=
 =?utf-8?B?Z1V5THQraWl0b1d5dWRjS2hlS1B4WHEwcFlUbU5HOG1paldLYTFYT2VqVjBr?=
 =?utf-8?B?WGVwOTZwdFJKbFV1L1BFMUljSHEwaXo3ZUlYYkM1Znl1NW1YOEJKbUpGT09i?=
 =?utf-8?B?MGRvd3E2enNhQ2kzQkJ2UkRZUWpRYnY2SERJRFQ3Nm1BUmllUTJTSVVGZFlS?=
 =?utf-8?B?emtZbmZKK3hEMXBwRjA3WUJETUtBTG92Nk1DeTUyTGRveGY5NERmbTZqSzBP?=
 =?utf-8?Q?fZrnJeRsNBjEruAZo/9PdSyQL?=
Content-Type: text/plain; charset="utf-8"
Content-ID: <E8A71DBAFC5E0B47B8E232FCF487A3BA@namprd11.prod.outlook.com>
Content-Transfer-Encoding: base64
Precedence: bulk
X-Mailing-List: linux-kernel@vger.kernel.org
List-Id: <linux-kernel.vger.kernel.org>
List-Subscribe: <mailto:linux-kernel+subscribe@vger.kernel.org>
List-Unsubscribe: <mailto:linux-kernel+unsubscribe@vger.kernel.org>
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: SJ0PR11MB6622.namprd11.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: e2b5a0a7-f8f2-4eb0-78ad-08dc1053a4c0
X-MS-Exchange-CrossTenant-originalarrivaltime: 08 Jan 2024 14:11:01.1673
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: TfC9UpT+wAc1LpdntPZCHv6J3wbk7I2OYiHP5SvwN7CBzoimrabghKolyirv5abTemxzLnCmcPxLnFr6donZxg==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR11MB5470
X-OriginatorOrg: intel.com
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