From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 665E9C27C79 for ; Mon, 17 Jun 2024 14:52:16 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A8C936B01FC; Mon, 17 Jun 2024 10:52:15 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A13C46B01FE; Mon, 17 Jun 2024 10:52:15 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 818126B01FF; Mon, 17 Jun 2024 10:52:15 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 5A76B6B01FC for ; Mon, 17 Jun 2024 10:52:15 -0400 (EDT) Received: from smtpin26.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id EA1924178B for ; Mon, 17 Jun 2024 14:52:14 +0000 (UTC) X-FDA: 82240670988.26.5D22DB8 Received: from EUR05-AM6-obe.outbound.protection.outlook.com (mail-am6eur05on2081.outbound.protection.outlook.com [40.107.22.81]) by imf19.hostedemail.com (Postfix) with ESMTP id BA7201A0003 for ; Mon, 17 Jun 2024 14:52:09 +0000 (UTC) Authentication-Results: imf19.hostedemail.com; dkim=pass header.d=arm.com header.s=selector1 header.b=d48h1cDf; dkim=pass header.d=arm.com header.s=selector1 header.b=d48h1cDf; spf=pass (imf19.hostedemail.com: domain of Szabolcs.Nagy@arm.com designates 40.107.22.81 as permitted sender) smtp.mailfrom=Szabolcs.Nagy@arm.com; arc=pass ("microsoft.com:s=arcselector9901:i=2"); dmarc=pass (policy=none) header.from=arm.com ARC-Message-Signature: i=3; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1718635926; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=3fneA06B+c6m57sZjcFjdKPhgm0kBE1zed7nx9xPdFc=; b=thaabdWljQtZpjryN0oYrdYNc7WkWYmJzXIuW8fArpXz+4a1ap0JKhjMl+HDvcXBYl0Vgp 9Ape6SZSD+TpZmIXV5ceJfm9QIvEBgQu3f4vhGoNMU2Qz9nSqXGcTqxWcle+7SrYVEfN1I SzuD88ByUVCumuxd7v+GPEGcJ+//V5Y= ARC-Authentication-Results: i=3; imf19.hostedemail.com; dkim=pass header.d=arm.com header.s=selector1 header.b=d48h1cDf; dkim=pass header.d=arm.com header.s=selector1 header.b=d48h1cDf; spf=pass (imf19.hostedemail.com: domain of Szabolcs.Nagy@arm.com designates 40.107.22.81 as permitted sender) smtp.mailfrom=Szabolcs.Nagy@arm.com; arc=pass ("microsoft.com:s=arcselector9901:i=2"); dmarc=pass (policy=none) header.from=arm.com ARC-Seal: i=3; s=arc-20220608; d=hostedemail.com; t=1718635926; a=rsa-sha256; cv=pass; b=ojUiTA7mRxfZ6pdXHBFBKmlO0/4HjBviYjXHTaybOhxXN+Ww1Tqmhw+yEciFOewysn2ARN R/pf9WIr2VMyFuEVTdkcOrzhwKzfc6Nz8aWmt9/jup9xGx/uH2aCmAXUNW3dnGNV88TwBp 9xf82z+jHaQfp6pHzsYgvMyPfoz6EYw= ARC-Seal: i=2; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=pass; b=glcLniBfHaiwyI42+bxOcBl/6HJCdcEZpOGaioSVOzB7B6ZtmGfj6izlutIuaNKBMAgbeN+B27Y4eAM1tUAhu6pX4/+vEBjyFtXC3twqOtDg/TJ5GYxYAgkZTbPfZgL5ARvwHIJk42PrFDF3AeaJHtzljzsChAR5XGr1hB/eagXYyKEFuVZek63vznkAO4ZBXJofFzZROLtSbv6vkEt9fORH2CfBH3CJyYofI0D0Zg7/bP9gg8QU2+2vH8jm+uwRQhbeBqkEXQxVHfqIrTINFqJICee2yp5v6zVsmTduCba5E9FYNmuX2xGb5Vc/xQGANcW5Cvk9oGWoHeSqqJh9XQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; 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=3fneA06B+c6m57sZjcFjdKPhgm0kBE1zed7nx9xPdFc=; b=kdmvbRnns+GbOu5PhmuG7onXvxWnBq18sAK1waSJy15o7geG7tHO4qgbOamEkIUJ5g55IeY96BV9EfpzobKM33LVNKlUtU9whUz0gZ9FvEBzWe0OXCcAVNVGGZCGuiWWYBtefSPFTgoly3uLaHNkgDXKvDzWhM+W7/usZOOAE4LPWb3IYD5fKkERY0ucWybMGdCtoLdhcaPCkf/RVcXvyU8QPnkEp0SFPJgzByT6mvGsEbV0QKME1UUjP5qE5Y1srjbDJnMmWPrdLUz6Z6t3iPJUZDI4qmcJX8HdCSMRnKJTM6VsjMDI/77aixZA3lWNmZBiui3G0updTXGMxndorg== ARC-Authentication-Results: i=2; mx.microsoft.com 1; spf=pass (sender ip is 63.35.35.123) smtp.rcpttodomain=kvack.org smtp.mailfrom=arm.com; dmarc=pass (p=none sp=none pct=100) action=none header.from=arm.com; dkim=pass (signature was verified) header.d=arm.com; arc=pass (0 oda=1 ltdi=1 spf=[1,1,smtp.mailfrom=arm.com] dkim=[1,1,header.d=arm.com] dmarc=[1,1,header.from=arm.com]) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=arm.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=3fneA06B+c6m57sZjcFjdKPhgm0kBE1zed7nx9xPdFc=; b=d48h1cDfztLIzGtU8x2M9xrT0PoYiJCsDXfXCjVOFxxr0NljAhHgFSc6gy+xHfvlgFOYZhJmBJmwmHtEIeZMgpayDb2P8mj9qEoCJ3V6VvifOVEhMYEiBxaJztczmg1Ny3LKv23Er/1uRF0k4Pz+5b2io81rj7s7mIs4rhxFt48= Received: from AS9PR05CA0064.eurprd05.prod.outlook.com (2603:10a6:20b:499::14) by DB3PR08MB8986.eurprd08.prod.outlook.com (2603:10a6:10:42b::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7677.30; Mon, 17 Jun 2024 14:52:04 +0000 Received: from AM1PEPF000252DA.eurprd07.prod.outlook.com (2603:10a6:20b:499:cafe::9a) by AS9PR05CA0064.outlook.office365.com (2603:10a6:20b:499::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7677.30 via Frontend Transport; Mon, 17 Jun 2024 14:52:04 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 63.35.35.123) smtp.mailfrom=arm.com; dkim=pass (signature was verified) header.d=arm.com;dmarc=pass action=none header.from=arm.com; Received-SPF: Pass (protection.outlook.com: domain of arm.com designates 63.35.35.123 as permitted sender) receiver=protection.outlook.com; client-ip=63.35.35.123; helo=64aa7808-outbound-1.mta.getcheckrecipient.com; pr=C Received: from 64aa7808-outbound-1.mta.getcheckrecipient.com (63.35.35.123) by AM1PEPF000252DA.mail.protection.outlook.com (10.167.16.52) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.7677.15 via Frontend Transport; Mon, 17 Jun 2024 14:52:03 +0000 Received: ("Tessian outbound f73a80402c83:v339"); Mon, 17 Jun 2024 14:52:02 +0000 X-CheckRecipientChecked: true X-CR-MTA-CID: d418c34d31778aca X-CR-MTA-TID: 64aa7808 Received: from caff7b950603.2 by 64aa7808-outbound-1.mta.getcheckrecipient.com id 1CC8B1DF-C890-4039-9B5B-65E99A14EB8D.1; Mon, 17 Jun 2024 14:51:52 +0000 Received: from EUR05-AM6-obe.outbound.protection.outlook.com by 64aa7808-outbound-1.mta.getcheckrecipient.com with ESMTPS id caff7b950603.2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384); Mon, 17 Jun 2024 14:51:52 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Vvj4AwIiu79WehRpoK1NIQjP7krJkxZlHQ3X3suzOOGIieecQ8cM5ovBXYPw47AN8zcoZ5eheEURg0ZeB8RKdqTRHFrLGakkp7jHWYSdiq3mVb9uFV20SGykN/AsHmu+Pihh4DHW+YPnvcfLTxlTnzsB6XbKUNi3xOQ7YdZkKQ1jhCbOc5sqnbcYzaFVTNy06iMufNOxaHiwNVg9iSnRsycsgt/KXLsSfVDMZkHT/n84AWr7DWdPxHCVqolSth7KcWViAdpwArdaTQIF0f2voYr52uE3W62dDmFqaMy8WFbbPcivmmYUwgeVbrIuBJwWfBPGGielTOHHbfJb2SMMfA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; 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=3fneA06B+c6m57sZjcFjdKPhgm0kBE1zed7nx9xPdFc=; b=UkDoc/mkKnB/orVzvPU1qv2bpaMgS2khDKELMNdrXj62DkniBDnbK/WAYFSUrN+AgzVyWgZGH/Vxxo/rMkT8uNyuVg0RN8rufyJk8MUTTMLzc03l/RVvD46xPtf+SRTZoAKeb+PLdGhegjlhXpi8V06RaBKURNbZ6tjmHITKnyyPyTtei64rsXK8E19NAF6cQN8LSY/3TCYALl3YriL900nnhGsdKSOxO82YrgRHvE4XQYIYdhxvPbB8A/Ox8nwMgNHvWjToNEnUEsvPEOFKMSnY3DrcC3BLN1GOFQVZ+yuqWZkzdUt/gl6mXAJmZx3NadkS84++iX5sAtO7Ayg64A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=arm.com; dmarc=pass action=none header.from=arm.com; dkim=pass header.d=arm.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=arm.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=3fneA06B+c6m57sZjcFjdKPhgm0kBE1zed7nx9xPdFc=; b=d48h1cDfztLIzGtU8x2M9xrT0PoYiJCsDXfXCjVOFxxr0NljAhHgFSc6gy+xHfvlgFOYZhJmBJmwmHtEIeZMgpayDb2P8mj9qEoCJ3V6VvifOVEhMYEiBxaJztczmg1Ny3LKv23Er/1uRF0k4Pz+5b2io81rj7s7mIs4rhxFt48= Authentication-Results-Original: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=arm.com; Received: from DB9PR08MB7179.eurprd08.prod.outlook.com (2603:10a6:10:2cc::19) by DB9PR08MB9516.eurprd08.prod.outlook.com (2603:10a6:10:451::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7677.30; Mon, 17 Jun 2024 14:51:50 +0000 Received: from DB9PR08MB7179.eurprd08.prod.outlook.com ([fe80::7d7e:3788:b094:b809]) by DB9PR08MB7179.eurprd08.prod.outlook.com ([fe80::7d7e:3788:b094:b809%6]) with mapi id 15.20.7677.030; Mon, 17 Jun 2024 14:51:49 +0000 Date: Mon, 17 Jun 2024 15:51:35 +0100 From: Szabolcs Nagy To: Florian Weimer Cc: Joey Gouly , dave.hansen@linux.intel.com, linux-arm-kernel@lists.infradead.org, akpm@linux-foundation.org, aneesh.kumar@kernel.org, aneesh.kumar@linux.ibm.com, bp@alien8.de, broonie@kernel.org, catalin.marinas@arm.com, christophe.leroy@csgroup.eu, hpa@zytor.com, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, maz@kernel.org, mingo@redhat.com, mpe@ellerman.id.au, naveen.n.rao@linux.ibm.com, npiggin@gmail.com, oliver.upton@linux.dev, shuah@kernel.org, tglx@linutronix.de, will@kernel.org, x86@kernel.org, kvmarm@lists.linux.dev Subject: Re: [PATCH v4 17/29] arm64: implement PKEYS support Message-ID: References: <20240503130147.1154804-1-joey.gouly@arm.com> <20240503130147.1154804-18-joey.gouly@arm.com> <20240531152138.GA1805682@e124191.cambridge.arm.com> <87a5jj4rhw.fsf@oldenburg.str.redhat.com> Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <87a5jj4rhw.fsf@oldenburg.str.redhat.com> X-ClientProxiedBy: LO4P123CA0670.GBRP123.PROD.OUTLOOK.COM (2603:10a6:600:351::16) To DB9PR08MB7179.eurprd08.prod.outlook.com (2603:10a6:10:2cc::19) MIME-Version: 1.0 X-MS-TrafficTypeDiagnostic: DB9PR08MB7179:EE_|DB9PR08MB9516:EE_|AM1PEPF000252DA:EE_|DB3PR08MB8986:EE_ X-MS-Office365-Filtering-Correlation-Id: 1ec957b6-d031-4922-a082-08dc8edd0d03 x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0;ARA:13230037|7416011|376011|1800799021|366013; X-Microsoft-Antispam-Message-Info-Original: =?utf-8?B?aFRmaTJUaEplZjIxcFdMam1JUU55cmdUVzdvMlBob05mc1BsNGVRVHUvYnNH?= =?utf-8?B?WWtGck4va0kxKzhqNzltb3ZtakNUVVAxWUE5czZIN0J5eHN2ek5lUGExUTd4?= =?utf-8?B?U096VlRJdS9nTGlXdmFYQlhXVVRRMnNlTVE4S1RwUlFlTnkzS0crMVpKbjg1?= =?utf-8?B?SENEQmFoODdYcW5pVjNlemRJNmtycU5KeEpET2NHSUxwc1IycFJCbk1oZGZr?= =?utf-8?B?RWUrRWlYYTI3eGlqTEdFeDl3Y2NRSlp0ZVp1ZlZ1QmpyODdYakE0ZzRCTnZE?= =?utf-8?B?cHBnVktXZGZFSzVJeFdqbEhkaE5ZNm12OU1ib0NDdFdNU3M0NTFqQnhTWWRk?= =?utf-8?B?TG5OeWhXcDl4YTZkSFJ0TzFNTXV2TjVPdHdaaEtubStQNlkzeStNREVZYUVG?= =?utf-8?B?NXBxUU1NYlJxdExrU0VsMVl4RDQ3eDN0MlRhMFRYNGtoVlJLVHlpU0tMdXRY?= =?utf-8?B?WithUTZyU0Z4TnB3MG1RTStPVEY0UE1vTzNlM2U2aXVlKzQ2WGFQbEVZdVBj?= =?utf-8?B?VUduZDJiVnVndk84NGpPVDFlODRYRzB6dWU5clFnWFcwMFoxaDVMWmpiTDhS?= =?utf-8?B?QlhGYXNZTDVORklHR2Y2bGozeXliQkR5WXd4d0ZXa3o5aTUwWE12U1BQRHVB?= =?utf-8?B?b1h3cFZ5SE0vT1dvV3pMdFF4RlpVT2VtekM2dUszUFBReGtWeGZJVjR2eGRQ?= =?utf-8?B?b3hZK1M2amh1UHMwN2liQk1PMFVMcHhEa09NVk0yWkRTdDFsR0Jtam9tVHdn?= =?utf-8?B?VDE2MzRpaGlXbzI2SGJQNEt5R1BPRitSTUVZTWQ1dGRKeFgrbzhFRWZOWkRq?= =?utf-8?B?amRqcHJtbVpFT1ZKUVFBcUJxbndhczU2elFDY1M2L2RDVTdkZU96M09TUjJQ?= =?utf-8?B?YXc3WmE0RGJ4Tm90bmtrbFBJU3cxckZRL3pSbCtPU0swa2pFR0dNdXFBb3k2?= =?utf-8?B?UlNhaHIyMnlNVm9CQUw4MzlRM2YxdnQ4WjJvaVVqYXozRkNxOXlOWWM5RWJX?= =?utf-8?B?K2d5cXhhWlovRWZnWVoyMXJYSzJFWU1jZFZLTGs4c0wwcGhLZHJtWTAzQUNP?= =?utf-8?B?T1N6ZHZCZFQrU3FxMFRoOWVNeW0wNXhpZGErMzZseHJLNUxuY011bHhENFFR?= =?utf-8?B?KzZMUHJZeVVhd2ZNZzVTVStLQzcvTHNyeXRxWGlTdERyQW5Nd25KaGNHRy9Q?= =?utf-8?B?ZjhwYUZHK1hmY0s3ekxQMmV3eGExeWR2aVI2VkR6Z3o2T0liUE1qOW9sNlpa?= =?utf-8?B?WStidE44QnIzOTFZcXgvbmd1RkRYWkJVVTZIc2ErcmdCMnNnSkhNc2RvdmJo?= =?utf-8?B?aFMyNTJuQzZLVSt6ZkZSNkQ3VTY2NHhkVG5JNXVoY2hEby9zcVl0QUwySS9i?= =?utf-8?B?Skg0MG5KNVdrNFJkNExiVEI4NHkralFhYzdFRWFVUVNIeGgwSmp1VHpGUXR5?= =?utf-8?B?a0xNWnMwRytQZjdMa0lWRE1NMnJIWHNhT1BENW1wbWtCT0hjK09Jd1k1QUo5?= =?utf-8?B?azNlV3hKT2RFQnZFNHVyeDlGVXhENFdFMDlKclFhRzhWYmFaeDcwMkdxQW5t?= =?utf-8?B?T1pLQXptSlF0RjNmOVlCUFBCNHRFZG1Qckw1Qjcvd0QxeU40YVVBVENaN3Az?= =?utf-8?B?cFBpK0ltM1lBOE9LSVdPMWd5eURpQiswVENKaFFEMmluWUF6dDFnb2RKTWRG?= =?utf-8?B?SEkvenNWbU5CYk13YzNMOU1IeCsxVDR3MkkrbThZRWIwVC9BSG0xcjRLaXNh?= =?utf-8?Q?Vder6hzHj5VCHYs4sh7nyEzdOSSCF+Z6HsOvLRQ?= X-Forefront-Antispam-Report-Untrusted: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DB9PR08MB7179.eurprd08.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230037)(7416011)(376011)(1800799021)(366013);DIR:OUT;SFP:1101; X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB9PR08MB9516 Original-Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=arm.com; X-EOPAttributedMessage: 0 X-MS-Exchange-Transport-CrossTenantHeadersStripped: AM1PEPF000252DA.eurprd07.prod.outlook.com X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id-Prvs: 1225ba1d-eae0-438c-5019-08dc8edd04b1 X-Microsoft-Antispam: BCL:0;ARA:13230037|376011|1800799021|82310400023|36860700010|35042699019|34020700013; X-Microsoft-Antispam-Message-Info: =?utf-8?B?RS9LSEYwelRqWURtRGdQTGd2U3oxbWl1bi9POFFEb2hKSlNnMi8vVUsyRWtq?= =?utf-8?B?bUlCQnA0R28yaG1RbXlqOUo2eGtTMzZnOVlJTThRWmdCNzBIcU0zcEZPa3ZY?= =?utf-8?B?bCtOczNYR0kzWGxwRmVwemdqUFFPdXJZUU1uNTB6THdPNHlUbDQ3RUkyemJq?= =?utf-8?B?R3RSSmZOOW1HZng3ajRQdW5PWmFnb0piM0lPdVhlZXFGKzZ4clFyalRNeUk5?= =?utf-8?B?OVYrdEdlOHRNZ0VUd2M2QjhDQ1FTQnlsOXAxRm9LcTZCRHJDRFVETUo4dS9h?= =?utf-8?B?QVFTek8wbmdTZ212WkFJWk5obzV6NHJDcDBqN2FnU0M4VmJ4U3JRUmxJczlQ?= =?utf-8?B?Z0ticW1NV0ZReGYxd3Iya2YxSmpVanNvU1pjaEx3WUZ3c0RrN1ZBdTFuYk9k?= =?utf-8?B?OTVyeEw0ck9rOW9La01RYkNCcVh1RTkwRGhqRENEd3UxUzVybnNKZFZIRkhG?= =?utf-8?B?M09MaW5HWkZsQll3MXdPUkY4MGx6anhuRUh6eVd3anZ0bEFESkZnNHhQQWs4?= =?utf-8?B?WVVsMFlQc2NUWkRxc3pvR0ZkcjNhWWI1aFJxLzZmZ1RjTHd6eE8yVlJUKysr?= =?utf-8?B?VnZLdkcrL0Y5dmtLVDhoRzAwdHF4SUxHRFh6TG5vcUlTS2dTYVNlSExyY0Z4?= =?utf-8?B?U2cycjNSdUgzajVSMjVxMExXdHFacVpkbzBYZlRxT21EQzNGZ2tJbzNabWVK?= =?utf-8?B?QnRpTlNTVEtzR0d6TkdDbXBNOE04MzBXZzFRNXppeC9LdWNpdSs1dEZ6TzNN?= =?utf-8?B?bnh4M3ZOY2ErVjdSdWtBbVQwaHcvQUJlSU9EZTczNmVUUVdzWjJxQ2dmdzZ4?= =?utf-8?B?NlF1WjJKNm1qNUZzTjBWZ2t3NHNJb1IrSGE4eVBreDlRUlNsVU50SkhSaEpO?= =?utf-8?B?UjZxTUl0ZG1IcGUySlBWeWRXaTZTWUIwS0dlRFpVQ0JhczZVZEt4RjhVNUV0?= =?utf-8?B?N0w2L3UwUzdLeDg1VGxnZ3dBc2UxYTcyNXFWKzl4ZGZxNmJaU0R2c3lWY1hJ?= =?utf-8?B?OWl5SDZhSE9uV3dOQnZqdHJnNFZ2N0hQVjdsakNib3BuMCtuU3JKTWsvUU1z?= =?utf-8?B?ZXd0N09EVDJrOGs0RzR2V3plOEVlRXFOeGpBNmtYaVBRUG5PVUszM1FHejFB?= =?utf-8?B?SG4xUFBPYkVDcFlQNlFZMEFsdXRoTG5abzBMZG1xZ0VCRTRGeTJtZXRibEpC?= =?utf-8?B?ZHFNbXlkdzIrMjlzT1BBZW91TUF3NzdNaUVIQmVGRlNNRWR2YmZnRXZUK09w?= =?utf-8?B?d3RqNGtSWnY4azhQVy81ajhRUmw2eVVITk9SWk1KNHNiaDVQRUs0eXhLaHFL?= =?utf-8?B?STdRbXpNWmU5aU1YYVdDNVJyVHN5aHdPUEZhZlFNRkh1MzF0dkdMVlFVK0Nr?= =?utf-8?B?MW9oYmhoTE9UUlRhaHZIZVMveHZJbFZYeU5ScDRSZ2t2RGhPTkNuN0FESGtM?= =?utf-8?B?TjI0S0I2czdaVC9QVG9zR2w1ZkIyT1haZEMybHRMVE45QkRHZityTUpXWXdN?= =?utf-8?B?aWM0dVh3c2dWV2NVUDhjZTMxTnV3UTB6SUlzWm5ZMlVGTGU0RDBmTDZxNlNP?= =?utf-8?B?bFdXZjcvYzlwNFo5ZmF2c0xkZ0dTZ2EwUkxCYlpJczFQQ3Q2bVV0MUVFQ3Jk?= =?utf-8?B?ZGpMOUxMWkVNbnE2K1dJTW1WdFJZUnI0Snk5UW8zaEpHa0I4eGFURWR0NXJI?= =?utf-8?B?SXhCYS9vNXFuRHQ5MU9JaVFrV0NIQyt1RUVDalFnNm1yOEFWWm1VSEo4Ui9V?= =?utf-8?B?R2hjamVYbXlENnVuQjF0eVlEWmZQMkJHVFZrclE5Z2NOYkRqTmFpcVNyeTd1?= =?utf-8?B?aGRwSElSZGlOS0JFdSttdEtrV3lEZlhyemRZT2hEaDJVUk9KbURPckRCTFE1?= =?utf-8?B?ZlFXbUUwTTBEeFREbmdOTkV3Y3QyMXdNL0FFUCtDSVAyaUE9PQ==?= X-Forefront-Antispam-Report: CIP:63.35.35.123;CTRY:IE;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:64aa7808-outbound-1.mta.getcheckrecipient.com;PTR:ec2-63-35-35-123.eu-west-1.compute.amazonaws.com;CAT:NONE;SFS:(13230037)(376011)(1800799021)(82310400023)(36860700010)(35042699019)(34020700013);DIR:OUT;SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jun 2024 14:52:03.6557 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1ec957b6-d031-4922-a082-08dc8edd0d03 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: AM1PEPF000252DA.eurprd07.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB3PR08MB8986 X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: BA7201A0003 X-Stat-Signature: 4i1jqoi1wndqsn49bticpysziahwwufe X-Rspam-User: X-HE-Tag: 1718635929-228018 X-HE-Meta: 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 gJXfegZs DFR2aUaTDvZgInjpgZF3YJhJyHM8lN8IpE23mdHf3P2NqSycYcA1Stg8KjRllRgsaguGl0P7VSXVYo7tUm3fGuzMiLp2l8rN6XCRzpe2etsT8ThiIUKNc0snaqp47l4AoRoKwuR1PXL4LWvzM5x5slp3T9PSpje1KrQaKplFdyehZZYqxGoWNKsnHjtfiNtbcXMdoHPvPXEtaPxz40A6TVYTgVRwdRiNGIzF1f6j4n8bk7wou5IngRmkAWPYBYEb/03aeQ1fDRiLgwvu7aONkBZT0loC3wzuA+9p+4lEcUY7ghNofAyLS/bB1Zyg1Vx9msREV1ID6Zt11vGxU3KoSc2GdptrVIpsetf79JBFmVkcKd8HXO8PchHIX32pi7KBZPtSYU/KWFie5cJPymVsgKzUKNJTD08UaZhZV6vub87cnJZnds9heXcs4SQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: The 06/17/2024 15:40, Florian Weimer wrote: > >> A user can still set it by interacting with the register directly, but I guess > >> we want something for the glibc interface.. > >> > >> Dave, any thoughts here? > > > > adding Florian too, since i found an old thread of his that tried > > to add separate PKEY_DISABLE_READ and PKEY_DISABLE_EXECUTE, but > > it did not seem to end up upstream. (this makes more sense to me > > as libc api than the weird disable access semantics) > > I still think it makes sense to have a full complenent of PKEY_* flags > complementing the PROT_* flags, in a somewhat abstract fashion for > pkey_alloc only. The internal protection mask register encoding will > differ from architecture to architecture, but the abstract glibc > functions pkey_set and pkey_get could use them (if we are a bit > careful). to me it makes sense to have abstract PKEY_DISABLE_READ PKEY_DISABLE_WRITE PKEY_DISABLE_EXECUTE PKEY_DISABLE_ACCESS where access is handled like if (flags&PKEY_DISABLE_ACCESS) flags |= PKEY_DISABLE_READ|PKEY_DISABLE_WRITE; disable_read = flags&PKEY_DISABLE_READ; disable_write = flags&PKEY_DISABLE_WRITE; disable_exec = flags&PKEY_DISABLE_EXECUTE; if there are unsupported combinations like disable_read&&!disable_write then those are rejected by pkey_alloc and pkey_set. this allows portable use of pkey apis. (the flags could be target specific, but don't have to be)