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signed) header.d=none;dmarc=none action=none header.from=citrix.com; Message-ID: <214bdf26-9f30-7ee2-e59f-e8f0c96937ee@citrix.com> Date: Mon, 17 Jul 2023 13:23:13 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 From: Andrew Cooper Subject: Re: [PATCH] x86: drop old (32-bit-only) MSR definitions Content-Language: en-GB To: Jan Beulich Cc: Wei Liu , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= , Simone Ballarin , Gianluca Luparini , Stefano Stabellini , "xen-devel@lists.xenproject.org" References: <38707d09-92a3-2807-4bf0-167be5c3bb15@citrix.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-ClientProxiedBy: LO2P265CA0149.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:9::17) To BYAPR03MB3623.namprd03.prod.outlook.com (2603:10b6:a02:aa::12) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BYAPR03MB3623:EE_|CH0PR03MB5987:EE_ X-MS-Office365-Filtering-Correlation-Id: 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88fbfba8-33b6-4f70-f8a5-08db86c09ad2 X-MS-Exchange-CrossTenant-AuthSource: BYAPR03MB3623.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jul 2023 12:23:19.5046 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 335836de-42ef-43a2-b145-348c2ee9ca5b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: vZZLWC84ThGoMkpFIY5ez0Ag4Uh01v57rNQdLEcznjblDMSljALt0PjeNpn0pi5gl3t++LRlcwT/XFm6vGEMj/lYpPTLkYegFQ68AsB2axY= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH0PR03MB5987 On 17/07/2023 12:52 pm, Jan Beulich wrote: > On 17.07.2023 12:33, Andrew Cooper wrote: >> On 17/07/2023 10:17 am, Jan Beulich wrote: >>> /* Intel defined MSRs. */ >>> -#define MSR_IA32_P5_MC_ADDR 0x00000000 >>> -#define MSR_IA32_P5_MC_TYPE 0x00000001 >> These are architectural.  They still exist in all Intel and AMD CPUs. >> >> I'd suggest keeping them, because I think we're required to expose them >> when advertising MCA. > We have them twice, and I've kept the instances without IA32 in their names > (at the very top of the file, i.e. already in the "new style" section). Ah ok. Acked-by: Andrew Cooper