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Wed, 21 Jan 2026 00:44:57 +0000 Date: Wed, 21 Jan 2026 08:44:47 +0800 From: Chao Gao To: Xin Li CC: , , , , , , , , , , , , , , , , Subject: Re: [PATCH v9 19/22] KVM: nVMX: Handle FRED VMCS fields in nested VMX context Message-ID: References: <20251026201911.505204-1-xin@zytor.com> <20251026201911.505204-20-xin@zytor.com> <3F71014C-5692-4180-BC6B-CCD7D2A827BB@zytor.com> Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <3F71014C-5692-4180-BC6B-CCD7D2A827BB@zytor.com> X-ClientProxiedBy: TPYP295CA0032.TWNP295.PROD.OUTLOOK.COM (2603:1096:7d0:7::13) To DS0PR11MB8665.namprd11.prod.outlook.com (2603:10b6:8:1b8::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: DS0PR11MB8665:EE_|SA1PR11MB8573:EE_ X-MS-Office365-Filtering-Correlation-Id: 4840f290-cd3f-4edb-a1fc-08de58864cbe 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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>> >> Why is only this specific MSR handled? What about other FRED MSRs? > >Peter just gave a good explanation: > >https://lore.kernel.org/lkml/f0768546-a767-4d74-956e-b40128272a09@zytor.com/ Do you need to set up vmcs02's MSR bitmap for other FRED MSRs? Other FRED MSRs are passed through to L1 guests in patch 8. Is there any concern about passing through them to L2 guests?