From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from NAM12-DM6-obe.outbound.protection.outlook.com (mail-dm6nam12on2090.outbound.protection.outlook.com [40.107.243.90]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F213233F9 for ; Fri, 29 Aug 2025 22:08:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.243.90 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756505319; cv=fail; b=tLEXkvRTJufit84CGDmh2Kv9dQBPvqtGbcjXudT1qLrzJjZApF7q6bfPGR/1VydLC6Nk6YdpdrzL+G/8aOxpAWvtQdxArLKjURY88g7P3GXKVY9NaoQmKc3YFtICOuB13NaGeqXsZpFRVIyZDsMHkhqGTkuhHYXgE+/Ob65H3Rw= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756505319; c=relaxed/simple; bh=GYUQHCaXNQWCOiL+svetgdy9vFWe3yujdS6VPBisTZg=; h=Message-ID:Date:Subject:To:Cc:References:From:In-Reply-To: Content-Type:MIME-Version; b=gSwYQdQ/AqipuElDFrTmcnuX/tIqvMWdmjQO0BXJdBDK15R+fjU2iqxBoIugXILKLLIvLN2/NErZxLIbBGq6N0XLzvWFw4lhesic3nezzva7+ufHpYBrbYqqn1ickvpS8QTU0n6Zd4fMj6XeiPC+GQ5bi01nEEZX0e0gTYRTkco= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=os.amperecomputing.com; spf=pass smtp.mailfrom=os.amperecomputing.com; dkim=pass (1024-bit key) header.d=os.amperecomputing.com header.i=@os.amperecomputing.com header.b=uCr7+fv8; arc=fail smtp.client-ip=40.107.243.90 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=os.amperecomputing.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=os.amperecomputing.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=os.amperecomputing.com header.i=@os.amperecomputing.com header.b="uCr7+fv8" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=SJHSTtcobt804q9GUb4/vSrCN6tyhXer60i86Obz7jf7PikcqhqJZhEud48gBrDtrRQ8/cgxgnx8aiIJvhqDt0dF7FKoyp7T2G1Uwjk7Rjp5R1ySqOvi7mveE1/ngqoglMh06kVqe+r+/b/nfvW/7rz7cmmLuNbYGa2haHCiwwyDADc94fifa6U1jZBJtcRSEa8HT/8GsVMD3OxGnP4UmaLNznDCcqDej73KD8+i8u/euJSH7wUm8z+DCmI8PQaez0WMe8iFdlzxbirsjJWLyQV6ZpFL0nFBfd0dp1DK4jxB2kMJOSplzrTJNXnRe9Qk0IKvw0KjOXQIxYIUFz2BHw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=WwxTzfe7/vzr4O6TN8SWaVuNzBU/xY03E4daSqx4M+E=; b=N3gsbfJTjAiEHyMk6yFRDLyVSuIqCxblGgdB7ImkcPpi695qFX5CS7BC1e4l9B9gfqddqdXYP74v2sPh2TOZIQzGoutwyQWiKXW1fHDmM5/opmvZ8hO1nAKZZdLv9uWcAkaAkr4b1UiQR/XApKZV5fTCNZfvtxsAp3UjGx2E8R5RJSvayP/mK+i7jM0sW0v6Kicy7Zx/vf80GpTYTzz3uR4WosOZTFIj2EBfGFF1zR6fCG3ogjyDVKPtthhwufRCCh6uGiJilNFOkngxjoHvBaPGq1HlHLJ5V/K5+XqsGbmNAdlnA4mROF+cVM8kbDaAjsXaz0GLkwiZIZINmU+16w== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=os.amperecomputing.com; dmarc=pass action=none header.from=os.amperecomputing.com; dkim=pass header.d=os.amperecomputing.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=os.amperecomputing.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=WwxTzfe7/vzr4O6TN8SWaVuNzBU/xY03E4daSqx4M+E=; b=uCr7+fv8FkMrxZiMboYp05v6o0nyiLg8vb9BoCdFuPJ37kHBDNZ5eio+0KNiIcd34e+kRyeLS0mgief0Gl0RwMO2arQS/TavV8iV9vrYWlbJ/MIKGArVtF7pH3WzO+6t5K8VQ2px0qUiz0odmpu4/wDV3GQnfV2+XaGr2WDCMQI= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=os.amperecomputing.com; Received: from BN0PR01MB6877.prod.exchangelabs.com (2603:10b6:408:161::22) by LV2PR01MB7693.prod.exchangelabs.com (2603:10b6:408:176::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9073.21; Fri, 29 Aug 2025 22:08:30 +0000 Received: from BN0PR01MB6877.prod.exchangelabs.com ([fe80::91fc:9877:8a2a:d4e0]) by BN0PR01MB6877.prod.exchangelabs.com ([fe80::91fc:9877:8a2a:d4e0%7]) with mapi id 15.20.9052.023; Fri, 29 Aug 2025 22:08:29 +0000 Message-ID: Date: Fri, 29 Aug 2025 15:08:23 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 2/6] arm64: cpufeature: add AmpereOne to BBML2 allow list To: Ryan Roberts , Catalin Marinas , Will Deacon , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , Ard Biesheuvel , Dev Jain , scott@os.amperecomputing.com, cl@gentwo.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org References: <20250829115250.2395585-1-ryan.roberts@arm.com> <20250829115250.2395585-3-ryan.roberts@arm.com> Content-Language: en-US From: Yang Shi In-Reply-To: <20250829115250.2395585-3-ryan.roberts@arm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: BY5PR17CA0062.namprd17.prod.outlook.com (2603:10b6:a03:167::39) To BN0PR01MB6877.prod.exchangelabs.com (2603:10b6:408:161::22) 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: BN0PR01MB6877:EE_|LV2PR01MB7693:EE_ X-MS-Office365-Filtering-Correlation-Id: 47bce957-5add-4dce-ae24-08dde74893d2 X-MS-Exchange-AtpMessageProperties: SA X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|7416014|376014|921020|7053199007; X-Microsoft-Antispam-Message-Info: =?utf-8?B?YklwU1U4RnhRdnlzUVdCL3dVU0xUZkx4Umk4L25KcnlBVmQrdklNZkp3eWRn?= =?utf-8?B?RlpKUGlTNXJvblZSdXRQZUZJcVRIZ2VqL01UeGlpcG8zYjRGYjRmMXpkU2Jp?= =?utf-8?B?Y0E5UFVqaC8vM0tzVm5ndjJ0U1czNGQrVk9ybCtJWHk3U2pXOVBVNDduSjBU?= =?utf-8?B?N3N0TjVBTEpBeEdMYlB4elBDWGk2eHBvdVhCc3B5ZTVPa3gvbHJuYk1BSEUx?= =?utf-8?B?N0t6NG05MnBxekFiclh2cmxXYWxueFo0UUIyVC9GRXlvTE9NcU56eGtwd1NI?= =?utf-8?B?NHZmdkh6bFZ6ckQ1bkI2THRVbFdDZUp6c0xuVlNRT25hamZoL2RmUkhJYllP?= =?utf-8?B?eFlZYk85VXRicVZwYTlNdjNXZHBRMGpGNzNkcTZFeXhhcUR0VU51RFJUUVF5?= =?utf-8?B?Z3drUEZnMmM5dWhrSHFGU1E2emJsQUo3cC9ybFM2TW5NcERVODE0eWZ5VzI2?= =?utf-8?B?U1AyMWxFcHRhRTFyc0ZsZ1pEeUxtUFU4eFdTTjNDeFFxUGVIamhmVFZncm92?= =?utf-8?B?ZDFIU05IKzBFb0R4ZGRNVi9xRHNFV0hId1FPay82czJ6ZzR1UllObU9IK3VS?= =?utf-8?B?T0lWNldYYXoySDg2dmx4dHd4SWVINHJrSUdFYWtHU2ViTlVMQllmenp1R3Ra?= =?utf-8?B?ZklFV1pQZ0ZJN3hXcUlOVVRQMUhGRDBNS2tPTE1RcXp6NDlOWFZzL2t5Q0ps?= =?utf-8?B?ajRHazUwWm5tbEtGTVkwVHBwZDdlZUd1UGc1N09LTEYrUXBMYjh3WUhOTVhY?= =?utf-8?B?aWZ5REdWYlNXRWFHR0pBNnMxRDRMODJabXB5WitibStweXBFY1JuOFhwNlVM?= =?utf-8?B?MDU0RFJ6a2FFbk0vWkdhWnN4MVNsSWExaFd3NGRCRHlYYjI1WUFnek5rSWVZ?= =?utf-8?B?K0VDL3RFdElDZ3NCWGVQOFdZY0FDVFFNVjdTQUpMMkg0OHhwem5DUE1iSWZD?= =?utf-8?B?NnFIZHRSdWcwOGpkM0pMSFN0a0pBNDF4cU9lbEZWUkM4TjFvWFJJaEdDVkVE?= =?utf-8?B?MHdNZk9CR1BFQ04vR21Uck9ham44K1lOT3BLSmcwa1VzWXlnR3A3WEc3d09G?= =?utf-8?B?a1cvWEpIbHdPYTRqMVA0RTcxQ0lYMHUrQktwOExSZlMzQ0ZiNVQ0SHZleTNh?= =?utf-8?B?Q29zWUVtNWdhZ1VCTTFqUWpxVXRtM21ZRXdWUVh0VnpVQy9ZTUpSZ1QzOW5K?= =?utf-8?B?K0pKYWhqZVFXU0VqamRsWlZkaUFGM1daNGYvWWU4ak9xbTRLRnpCKytnSnpP?= =?utf-8?B?V1hWZ1JRT1hlVENwU3g5YlIzQTgxb3NKQlpQQUsrMGRLQ2ljUzRuV0xPZTg5?= =?utf-8?B?RktheVNhZkRReU1WTU8wZG96Qi90Q2dtakR2L2Z3bnE5NXlkRkVPbVZQWTNX?= =?utf-8?B?ZWVOYS9Ia0MwbWJ0SmRXdGtaa0NtWUVCQjFZb2FWMXZ4SldORUtsVndVbTJr?= =?utf-8?B?U2N1cGRzdzY1dG5GRWNIN0Y3QlVsMXdmbHV0bVZnNWZSVWkyeUYxdXFOcEs3?= =?utf-8?B?Mk8zVmlIekRrc3FWREdVMWJFUk1vY2F1R21YVXFXeVQyRzQvWUR1T2loM3BL?= =?utf-8?B?by85V1hLWW1SNmFvaEZVSGp3WWRVUElkWGcvTjM2RXQwSkp3S2Zha1RrNGk5?= =?utf-8?B?V2RzYTZRcHpZaHorR0NGUllGUHFxM1RrNEY0M05wUGxEOWFtRlhZeUg1L0JB?= =?utf-8?B?a0ZxNElNLysxRnZCWWF3L1JoaG55WGdHcE5XejVHeE8raSszaWhIem9Xb2VW?= =?utf-8?B?enZkRThSWHNnSC9YNnZzaTdLK1BLbkhaenJ3ak92Rm1ybzlNNHJycTloM3RS?= =?utf-8?B?K29WcGx4ak5KUFB4VkZoZFlJZ2NTdWFCcng2RlloZmxJSk9HcVR1QSt0U01h?= =?utf-8?B?ZlNoWWM3QUh4czVBVU9qZUUwcDJzWW5LYTlBQ2hrbkQwK0lseWJhVmRGMmpN?= =?utf-8?B?djZRSnVDekdQRTE5akhCTkY0SWIzQVdGeUJaWHowTEpxNGRoa2NpdTllb3Rx?= =?utf-8?B?TXowMHlndXBnPT0=?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BN0PR01MB6877.prod.exchangelabs.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(1800799024)(7416014)(376014)(921020)(7053199007);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?TE0wT2o0aG1UaU83dWswQXpIbEtXeHF6cTA4RnFEYWdrSEo5d09YZ3JpOUwx?= =?utf-8?B?MmxnMmk4UGY1OHVsNzJEbmwvTWZBa3Nqem5MTDJqZ1c5QnNNYzl4cUJoTmY1?= =?utf-8?B?b2RKaHd2NzQxVWNUMnZwV0xkdlhoSFNzZGhPb2l4Zk5iOE1IOVI3c2tSZXFr?= =?utf-8?B?ejU4OTNRZjRreVBJL0duMG9QbHFUYkZISXlwWEZBLzRpRW1hbTNsQlNqQUZ0?= =?utf-8?B?TlNMYVFQcjZ2VkNFUnhvUTlWODNGcDBzb2tZWWFHUnVydkVLclorREtzU05w?= =?utf-8?B?THdIbndxNHMxOU5pUk02TUtPK2pISUR1MUlxbkFaT0xhN2JhL3l6N1JISTQw?= =?utf-8?B?bEpJZmI1b0I0NkxvY1hyQncrYW9HOExLTTNsZ3pEdTdsQzlnN3NlRzVkeUxh?= =?utf-8?B?aU8ySmQ3VjNFL3cxMzhROG1XL00zZmlGNmxoR0t5T01neEozWHlFY2xzbGw5?= =?utf-8?B?dkZHNDhkRHpQalM4c2QvREkrMHNZYVhRQ0wyYytzV1R3dWRvSlYxbS9WZ3pG?= =?utf-8?B?TEErdTJiSlZrckdZalplMERLdkMyQlBlQm5EUVB5cE9MQXhEcDg0Q2J0a2ZW?= =?utf-8?B?VCtyQWpoSlJNcmUxS3J6cW0yYS9xTkJ1UVZwTHBucmU2Z0ZrRnQ3eWxzbm9v?= =?utf-8?B?dysrYnhyQis1VERwY0lTQlVKdFhLM2RBSWdTR1ZmQTFnMnEwQnV6cklLTjNW?= =?utf-8?B?TWdXNG9GZCt1c010cnJjbmxQbytCaGF1Y3JtRFpWQmhhYk03MnVqQTlzamli?= =?utf-8?B?Unl6VWJVd3lUcGN3TU5ZYmpMNW4xenQydFNZWi9keU0xYkwwNHJja3VUZXZo?= =?utf-8?B?NGlVbHV3Z3BoUlgvNFZlTWg3K3ZkQUR5UkFoNmE4NVQ3SFNjWXh2QytKdTFt?= =?utf-8?B?N2hhYURCdWxuV2w0aC9SNndzajBrSnJlL3NtVmlnWi9rUUFFdFdmWGNjN0ha?= =?utf-8?B?QWpzMlpEYTluREtpUGQ5Z2tjYkw0SEk1RDR4OU9SbnFOanRydGd3cHF5MUh2?= =?utf-8?B?N3UyQkp0aHVJK1gzNktTRjB4cjJwdjN0RG9DMzZHUGI0bElvT0d4dGFYVk0r?= =?utf-8?B?ZGNRSkZIRHUxVlRLOXNFYUtodGIrN1BWMnptd01JWmdkcGZrNXo5TUJpWmM2?= =?utf-8?B?aTgrajlQTUx5N0NON3lPeWJDL20yWWRZZjlVNW9QSitQeXIyaFduTG11ZXlp?= =?utf-8?B?VHRtU3pWdTgyaTM0MmNiNExNZzNoZUFLVmdEalpWOUg0czNUakZTTjRWcWVv?= =?utf-8?B?MllVUi9mTnN1UUhUVGV5QVJFdlQ5bjVWOWx1K3BNbHdzditoYWE0NWcwQ3p1?= =?utf-8?B?eHhWazIxa2ltQXRyd3U3a1BQRVBYSTBQWElGQzFKcysvNUVQOWFBN3pkRHhC?= =?utf-8?B?aC9RZTNzZ3Y1aWRXS1dvbDh4Wk5NWVVUNWtTNjFrQnYyS2pYUUZRK2Z6S0wx?= =?utf-8?B?OFl5NWZLV21CdWN0SXk1UWNRUXNVOHhsQlBiR0pKeUhPNmc4M0hPRHdKRmFV?= =?utf-8?B?M3BxYm1GU2VaeHBPL3B6b1NYVk9qNGZvbnYxL3EyWE5TSGlRZHVBdWJmVlRF?= =?utf-8?B?NWNKdFdkWjQ5cWwyNTZ5NGQ0TnE3bTltemFNdTltTVIvbHJJSGpNRlBGVzlI?= =?utf-8?B?d281RHRwMTNrcGFjQ0FxczloQUdLNlZwM0pSVE9kdUsxUXlYS1ZUSjBMQnNM?= =?utf-8?B?SjFzN3J5ZCtzb3VrL0UwOVp6aUJBclluS0ZLeEhGNStWZFNuYTFyL1k5M0xx?= =?utf-8?B?RXZTR3BVaS9kQ3JLWVZudkF0MTZocjN4LzhSK1NVTlQzQUVXY2VUWjhnaVNT?= =?utf-8?B?OWJXY0N1Vzd5ZXNDeUZSMlQyS21FNkpwbVorcEtueWNXaEh2K0tNaks3cFFV?= =?utf-8?B?RGlzUG42cmdRUWxDTXNXZXlGLzBtTnpWbWd3QkkvZFc5Vm45MmNSZVEwQldZ?= =?utf-8?B?bWpNWU1jNGtsZ2NvQjZqSUt6ejR2Qlo2V25raEEwR3Z1T0RZbjluSmY4cUQ3?= =?utf-8?B?QTJPbC9MWW9kcHdzRWs4eFFGVmpIVC9tSDZHcU1HcjF3Rk12L1RJNFpEQTJ2?= =?utf-8?B?U3Q3dGhSdGtaN3JtRWtVVGtYWkdJRW9xMXA0UlJYZVVZU3pzeSsxODNLZkJx?= =?utf-8?B?cXFKNDFVRHdpZmJ4WGxjbnRkTU5ReWU3S0RZdVFCM1JCbDdEbGZJQm9kTTVZ?= =?utf-8?B?ZWc9PQ==?= X-OriginatorOrg: os.amperecomputing.com X-MS-Exchange-CrossTenant-Network-Message-Id: 47bce957-5add-4dce-ae24-08dde74893d2 X-MS-Exchange-CrossTenant-AuthSource: BN0PR01MB6877.prod.exchangelabs.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Aug 2025 22:08:29.9126 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3bc2b170-fd94-476d-b0ce-4229bdc904a7 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Ui30tcsFYOkJ7QW9pV3SG8rY8Crm1kh3ngHzUgn6QHhSVe2tzBBD40Dvh7yHkGW6yZP0zxwJ0jWmEhm01NXMRbLFluM3vugMi3yIfBwjoz4= X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV2PR01MB7693 On 8/29/25 4:52 AM, Ryan Roberts wrote: > From: Yang Shi > > AmpereOne supports BBML2 without conflict abort, add to the allow list. > > Signed-off-by: Yang Shi > Reviewed-by: Christoph Lameter (Ampere) > Reviewed-by: Ryan Roberts I saw Catalin gave Reviewed-by to v6 of this patch, I think we can keep it. Yang > --- > arch/arm64/kernel/cpufeature.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c > index 9ad065f15f1d..b93f4ee57176 100644 > --- a/arch/arm64/kernel/cpufeature.c > +++ b/arch/arm64/kernel/cpufeature.c > @@ -2234,6 +2234,8 @@ static bool has_bbml2_noabort(const struct arm64_cpu_capabilities *caps, int sco > static const struct midr_range supports_bbml2_noabort_list[] = { > MIDR_REV_RANGE(MIDR_CORTEX_X4, 0, 3, 0xf), > MIDR_REV_RANGE(MIDR_NEOVERSE_V3, 0, 2, 0xf), > + MIDR_ALL_VERSIONS(MIDR_AMPERE1), > + MIDR_ALL_VERSIONS(MIDR_AMPERE1A), > {} > }; >