From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from EUR04-HE1-obe.outbound.protection.outlook.com (mail-he1eur04on2089.outbound.protection.outlook.com [40.107.7.89]) (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 8F8411CF9B for ; Fri, 31 May 2024 14:58:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.7.89 ARC-Seal:i=3; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717167483; cv=fail; b=pKRdxfkYeHfh7u/R5BLCSH336F+vTs6+oY5mbkz+lbvrJkpYFxTkSEphUtHOX4aTLkLcT0CPrL8hDuP57kW/2BtQt9ttmnRF6pczvtgGQtNtvqLmCnPMgEQqkZP9jJJdQSXc12RRQ//H1yK6DOo3x+0mtsWB3xpCSFjHv4kDP0Q= ARC-Message-Signature:i=3; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717167483; c=relaxed/simple; bh=IQjs+9Vxu2E2sGL9dPcRcY2l7VdAYxrnrbb7oEgGGr4=; h=Date:From:To:Cc:Subject:Message-ID:References:Content-Type: Content-Disposition:In-Reply-To:MIME-Version; b=DADCnAYzTgXUju0Vt2Ay33DlTTtz3WCFOJclRRKolfxDUZm0kUD+MDeh90Y5vld2l3PKxz4Wzxb3XSs4UqUImJLcPmQsNmNucr5y+1/Qr6nTMuoe6UWAQe3vrOJw6/YNKxyCxwai6BX6bl+Ue8RRj+GbyiQp0vSx2qNO3MMTGnk= ARC-Authentication-Results:i=3; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=IiFRUDpc; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=IiFRUDpc; arc=fail smtp.client-ip=40.107.7.89 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="IiFRUDpc"; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="IiFRUDpc" ARC-Seal: i=2; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=pass; b=BqJNk0x12Zb7hU3827IBgajotZ5afcfYeHdLIco/8wRcU4eknGFhh/HilYh53SQd65UqqNzu0GfgxdtQdjBffwCc4Rgte1XhVHfSAo83ICByOu+S9MaC6p74vBCLck/UBWfcgXBPepQOIhNHBgpgGWBXjOSHDfuU8GgoHMKs1LjfgFKEhMytmW5jSKswlP1WSH8HT7PPXUymn57/kMz/5Wiel5jDq73guPG3MY8jZ/CmMPbE/OXsVQTP3a4WzY1aFcRbNi+zM7mnDshCzlTH9QlgJUcKfImSpEqr2J9yzIf1Fc4ECfckfjBux8ztzTTCirci/He7Fz/7L/RPUVL+Qg== 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=6fyDs3nrP7CF6zSQzwHD0RccZ+CrYXNXayMa/mBSk0g=; b=JCIuuD/NZceAOf5K7zathimnBSUl8qmg3Vpv+HJqtHi67r2ATSKTEhHv2oyX/BqlijeBuCnFC9P2crCr7l0fafcPsc0cc/ufsjrP7iRVH0MV3vyqcY6S6KRFKFJmZl5qp55Hp7xAR5mRmV/7i1i3+TnNFbBCiM6vto1hBXHqoUvGzd/6ZtuD5KfWmrttUkJYSCkJqnSFCIsgFaVkxYyX1+vn8TGXo4FAob1VcThfEZcELzWaEBSia2rZx7CM7UWrFpxgiCaM8E5D6T7qn8zrvopOdiExvIyiT2EwdYr0cl1ZZNLVOxRj7U0VYJaYBnGlqbeAGGfYoYN6Pm5lQ30SKA== ARC-Authentication-Results: i=2; mx.microsoft.com 1; spf=pass (sender ip is 63.35.35.123) smtp.rcpttodomain=lists.linux.dev 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=6fyDs3nrP7CF6zSQzwHD0RccZ+CrYXNXayMa/mBSk0g=; b=IiFRUDpcAVoQiNqUAO6+YUVP28VgWDAgnBJk/bjpu7IrR41eM5mlIRVIDLFw4OSVdW7r1hZIcTeYKkcEvhubQYWV3S79pivfEMz9ecfqzP+igu06pGpQQ+t+tXCoBtDiMO4oYxZ6sZecUBrffbsvkHsvZwqrvHtpd6PtwZbRhQ4= Received: from AM0PR10CA0005.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:208:17c::15) by DU0PR08MB8018.eurprd08.prod.outlook.com (2603:10a6:10:3e5::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7633.23; Fri, 31 May 2024 14:57:38 +0000 Received: from AMS1EPF00000044.eurprd04.prod.outlook.com (2603:10a6:208:17c:cafe::fe) by AM0PR10CA0005.outlook.office365.com (2603:10a6:208:17c::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7633.23 via Frontend Transport; Fri, 31 May 2024 14:57:38 +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 AMS1EPF00000044.mail.protection.outlook.com (10.167.16.41) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.7633.15 via Frontend Transport; Fri, 31 May 2024 14:57:37 +0000 Received: ("Tessian outbound c5e515ac9ee1:v327"); Fri, 31 May 2024 14:57:37 +0000 X-CheckRecipientChecked: true X-CR-MTA-CID: 49ef7dee730dc2c4 X-CR-MTA-TID: 64aa7808 Received: from fc581970f3d6.2 by 64aa7808-outbound-1.mta.getcheckrecipient.com id 1E6A01C6-4485-48B4-8D7B-C3E38CBB81D0.1; Fri, 31 May 2024 14:57:25 +0000 Received: from EUR03-DBA-obe.outbound.protection.outlook.com by 64aa7808-outbound-1.mta.getcheckrecipient.com with ESMTPS id fc581970f3d6.2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384); Fri, 31 May 2024 14:57:25 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=T0zbFUfBg9hBCu5I7UuAQOt2hZgHE4XAaWcejDMciIRajACWh7VtW5IecIZqlKq0GxUkk9mN2Ll1YeGJZzcuYMxSZsBPuv5VdeXX2YVTcAnkrpWRasOApOeXG0t9mRYQnY8p9pa6TVgM1Y7+aud9GissT89mPEn61yAteACBFV03oMyPsHX1ZqypRdf99gm/xLhedX8ysDO/pdDU0/y/wpaiAp+vC8drYlWsjJ76yvbafwcYBDuV7fFwJFaMLbemu1GhZcN6z2Wx33pBxbYHiA5v5upOSGeXoYhJBq82shjGu8NlVHsuS2gvrIrxkw2XIhMQ5n0VpJ1tWIQnAW5h6g== 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=6fyDs3nrP7CF6zSQzwHD0RccZ+CrYXNXayMa/mBSk0g=; b=LwwPKJSPjI1C7cvCPSzgMNnVsT6Ee00ZCwhhjhxi3758/B90BaZYzPt41tfHYBhlmfirLF63LgNASUiL495LiGF2sXy+qLZWmrxN83UieX3EQkm888eUWoylwpLTcpsbZTGDu+/1CPKQlSZWzlK5Q8VEblHjIK6EYW5ErY911hAhH/x1U6KwLPNwaT5VU6hW5CRdEyI97o9KL0jZMO0HoD7lyCBSCrgjgSOYwPGv5R02tM5uJoEj5AZ0OF4dHA7IgVbSmNmo6vg7NU5LbpUbtdZvWrpQBHy71T9ggHZ34cXtz6VPdjZx4CkMVA1e1edq7d1PoFWKm7Caz6JG1qt8pg== 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=6fyDs3nrP7CF6zSQzwHD0RccZ+CrYXNXayMa/mBSk0g=; b=IiFRUDpcAVoQiNqUAO6+YUVP28VgWDAgnBJk/bjpu7IrR41eM5mlIRVIDLFw4OSVdW7r1hZIcTeYKkcEvhubQYWV3S79pivfEMz9ecfqzP+igu06pGpQQ+t+tXCoBtDiMO4oYxZ6sZecUBrffbsvkHsvZwqrvHtpd6PtwZbRhQ4= 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 AS8PR08MB9147.eurprd08.prod.outlook.com (2603:10a6:20b:57e::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7587.35; Fri, 31 May 2024 14:57:22 +0000 Received: from DB9PR08MB7179.eurprd08.prod.outlook.com ([fe80::7d7e:3788:b094:b809]) by DB9PR08MB7179.eurprd08.prod.outlook.com ([fe80::7d7e:3788:b094:b809%5]) with mapi id 15.20.7587.035; Fri, 31 May 2024 14:57:22 +0000 Date: Fri, 31 May 2024 15:57:07 +0100 From: Szabolcs Nagy To: Joey Gouly , linux-arm-kernel@lists.infradead.org Cc: 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, dave.hansen@linux.intel.com, 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> Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20240503130147.1154804-18-joey.gouly@arm.com> X-ClientProxiedBy: LO4P123CA0165.GBRP123.PROD.OUTLOOK.COM (2603:10a6:600:18a::8) To DB9PR08MB7179.eurprd08.prod.outlook.com (2603:10a6:10:2cc::19) Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-TrafficTypeDiagnostic: DB9PR08MB7179:EE_|AS8PR08MB9147:EE_|AMS1EPF00000044:EE_|DU0PR08MB8018:EE_ X-MS-Office365-Filtering-Correlation-Id: 3499f53e-f191-4630-fb10-08dc81820348 x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0;ARA:13230031|376005|366007|7416005|1800799015; X-Microsoft-Antispam-Message-Info-Original: =?utf-8?B?U1psQmpTR1pkQ3FDekdlVXNGNFBrQ1FOTXpsT0hHZ1N5OEhpeUpGeVhXNXY2?= =?utf-8?B?WGFMWnZGT3Fza1B0b3V4Ulg2bWE4SHZocHM3UkJoS3BXVEdURVpyMW1VNThQ?= =?utf-8?B?d3RibEFrV0xVSUVUdHNCNUxjZitXQWlhSnBkV2dNTFNzZXAwTEFZbHh2QXB5?= =?utf-8?B?aXhyTEJ5a0hPWUpCUnJDYzhnNUptSnhwZ2tWSVVmdGhLZldJaE5sV2xrS0FN?= =?utf-8?B?MVRHVlJUUHV2NDBxcDRMaHNyWTlneTByZFVuZnhxbGNrTTNSSGJDY2p3ZHpU?= =?utf-8?B?eVVkejlrL1dPRzRra1FwbjRyMGRpWFVyZ2wrLzNQNS9ZZEtSQnl0Qy9kLy82?= =?utf-8?B?aEorR1dHSFZKSjRkYStJQXF5eUVqaWRvalQ1SnpKZFlHcU9JUTF3VHRCM2dq?= =?utf-8?B?YVdjVHU0bkFXV1R4VnFGa0FkL1dtMUJ4MXB2NU9Yc3VwM003WjQrRWo4L3E2?= =?utf-8?B?NEJLdUtVenROUFQ4V0VySWVRNVUrTldVdHBwUUd3MEg2blU1QmN3OVN4SDcx?= =?utf-8?B?ZmhucTR6ZUg0MmNlSG1ia05VVVpEU3ltMnhLbFdWT0h1b1BMWFhOMnMrYVFL?= =?utf-8?B?dzNPQVVjYWRBZlJacnlyeFpWejB1UzFZUCsvSTdkVnNqbHlLT0NzS054Z0c2?= =?utf-8?B?L1BEWjk2Zm1UVkVVZ0E5bFlDQy9HZG5HUmQ2Smc2UzBaK2VPcEwvaVkwV1Z4?= =?utf-8?B?ZFVYUHBxOUgyZ1NzVG1QSDRVbnF6TFVNVXN2aHdQcURGWmJ2dVprcTNkb3U0?= =?utf-8?B?WU1Mc21KNVRwT29zNmMyc3JPWlJtWCs2MzE4VzUwbVU1b0dqNU5CbWFlbDBX?= =?utf-8?B?a2pjRFVkTXNWWVlCcGFFeFBDWnh2ZjljT3NsRkRXcGk4WnhvVHkrckZFME9w?= =?utf-8?B?cTc4OGJnS2pTdHg1QnFxaXFJZ1Jua1RtbUZyaXZldjRrZ1Z0Z20zRTdWY0Jx?= =?utf-8?B?L28yeFlRVVBpREtXT3N2ZklTdUYveXRzbEJ2RUVWSHJLc1ZLczlma1NmZWVy?= =?utf-8?B?SDN4ZnIxYkd4VEE0bFBEZE9uMmhhOEVsRE1RNHdWSnErelRsRGJPV21PWk1m?= =?utf-8?B?WVVwdnAvME9hR3VEenBZV0JvM3hwTnFtMEd6Y2o5NHZVOXQzVTFpQVViVUhI?= =?utf-8?B?eHorVkNZR3MyU1l0L0RIdE1uUFl4QzhxTHh6VzVYSW5QMWt1am5MeEJpOHVk?= =?utf-8?B?TUJiMjRoazliNURpaCtVc3pCUmQ1OFdweThRUkk2M3FLemJjSDIzeFQ5ZERP?= =?utf-8?B?eFhUV2IxNEY1TWhaOXBJWEpnYU95bUUxdTVIc1JNbzJGZEx1MllrMXhUQ3Fi?= =?utf-8?B?UmRQSjhwcTNDYnVXQTRRcXE4N0EvaVRhaDFYL2hGTG1TanIxQ0pOelZ5N1lT?= =?utf-8?B?Sld5aEJUSzlmWVV6ZHdzL09OYnhGZHJGMzVaV3VnRDVPajUvYnVTM2lwaEM1?= =?utf-8?B?Y3ZoTUVZejgvUWdPdG5CWGZ0dXhXdGtITHlKQ2VMTDcrQmJ4ZnZ6VkNXUFl6?= =?utf-8?B?MExwRVdjRG84a2tRUFFWbVBvUndWNnB1NXhwRUVxZkNkY1I0dlluUkRKRFVF?= =?utf-8?B?V0NLa1B6cmpOa3oxQjBmRWVibTQ5b0dFa0RtdnBnMzE1c3IzTTlPbkR5SFNP?= =?utf-8?B?WkNnOStDM1k2VzZJL0xGcHMyWmpJMG9kQXVobkxxY0RmcEVtM1ovUGFIZUtj?= =?utf-8?B?K2x1a3JBbkxwVC9taXI5R2NyYkYycGx6bGlxV1RjRlpFMjRxc1IyR1N3PT0=?= 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:(13230031)(376005)(366007)(7416005)(1800799015);DIR:OUT;SFP:1101; X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR08MB9147 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: AMS1EPF00000044.eurprd04.prod.outlook.com X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id-Prvs: 1174fe25-a175-4ede-f27f-08dc8181f9f1 X-Microsoft-Antispam: BCL:0;ARA:13230031|35042699013|82310400017|36860700004|376005|1800799015; X-Microsoft-Antispam-Message-Info: =?utf-8?B?Zjltei9Kdm1DVEtLT1A1OGVyb1ZzOTF5bTRrVkg0UWdJV3RWVGpIdDFUbkRO?= =?utf-8?B?ZWdiR2tybytpbnkwZ0p5OWxpS2lxZlVUQVVuSm5MRXBlclVEaVBGNjZXUWNB?= =?utf-8?B?MW1iOGloZlRRV1ZmTVhrYVZhRTdtbE9TalF3c1lRY0ViUEd6ZUoxMzduM0k5?= =?utf-8?B?REpVVU1ZODN3RFpoOVZxRG15MzV6Qlh4cW1JQ2FaRmpPWlhzOHg5dmRKVWVX?= =?utf-8?B?aVJSV2k2TUVOUDVYdnk0SmhCYnV2UERwL1VPQjlEZ1NrcEZsdzg0TDVnbU0v?= =?utf-8?B?MFBpNFRCMVluNjQ3aVBlZmsyM2dqYUwva3JyWVMyYkkwS3dWTXpLa3dWU0VY?= =?utf-8?B?UVlIaDd0bGlVYjJHeFpydGptSk9ub0k0VnZZcWxWNDQ4QVlVU2VuTUdBMnRZ?= =?utf-8?B?YUx3Q0FYYk9tRGY0S0dDNE1ZVHVIRVdJM2RWV3lpWlVuaFVEZmJYd1BUMTd4?= =?utf-8?B?NTFpclk5RWxIL1c3VFlNU2lRRmphOTFuRDZXRld6d29DM2lLWGRmbWdYUlI5?= =?utf-8?B?Qk1PSjBnekpJNHV0SXZnbzNmTENKbUVEMzFLM1NOdE5GbWQyVW4wU1FZOEtp?= =?utf-8?B?UW1md0RGbXN4bDJ1K0dNd241NjgvNThWamZRNFo2N1FvK25oVXZ0OXpRMGhV?= =?utf-8?B?dEdLOURqUHYyNXJkL0RaOTIyMGF1NldSWEd5SENDN3hBOUkxczhtMXRPb2sr?= =?utf-8?B?cll1d25BVnJ3M0lPcnZvL0FwcE0wU0FZVElnbzZiSGx2aVpjUVhsRkhmSFBX?= =?utf-8?B?OElBaGFCZDNaRjVqNFJHaitYQ2lSRXVtOGk5MnVKb0wwTDlkR3dvRzYzUWtj?= =?utf-8?B?eDBWTCs1aWEvTFNHTG9nWWZNN2VpSmhqVVp0emJWdXE0WnNwZTFieUMraUdD?= =?utf-8?B?MTAwWEg2d1I1UW9RcUtBU3pRcjF1T05rOXNuWDgyNS9PZ3g2OUo5T3lrbkVE?= =?utf-8?B?ZzJjSjNqQmZ1ejNtVnJDZndLMTlUOWNGYVA0Z3RxbzRLRzd5NkRKbXJBKzZX?= =?utf-8?B?ME1acE9PSW5FVFdpd1hSdVFncTV0Q1lFejhqRUV2Q2NUeGZGYms5ZWYzaXAx?= =?utf-8?B?cS9RZnhoNGkwVVlmREJIMDZTeG1XZEdPazhWZWUwOUZZaE5JbW1LdkhMcUNT?= =?utf-8?B?VFJjZ0FBMVYrNWxocWlyTHFlL09sVjUyOXJyckRic2FLNWY4SHFOYzZWOG9P?= =?utf-8?B?WXhCUWZDNXJaZE1QendPaWZGb0lhRHArUUxoQjUzcEhnRXhjWkluOWxJOXpo?= =?utf-8?B?NWRodFZMckxJLzAxbjJqd2pkbkRJZ0RkSDk3cWFuQjZRamUyNGphS1NGY25V?= =?utf-8?B?aDd2VHFoV05kSzRSbGY2VzhTaUhFNFl1aTI0d0g4d1NZamVRRWxJQUt2NGxo?= =?utf-8?B?M0kra1IxTTFEMXZqYXk3Q0ticTdkTnVsOVZQTXpYdTF6eVh2dDQvTEhFNzh6?= =?utf-8?B?MmVtMEhMVlB5QmF6WXd1RVdyTE1vRVRYWi9paUhKbGo1UzlRbERwOEhON3lK?= =?utf-8?B?NEZmMTBIZG1tUkdaR3c4R3hBRTYvait3NHd5WU8yUzVjM0NadzBSWWVYOFZr?= =?utf-8?B?dGZiYkRjS3Frc0RKWDJUR2xlc2MwRi8wSlRWclFkTnFOYWtMQyt3cTFLWEly?= =?utf-8?B?NmZTMW52MlhMMHlpQWRBMlNSbkdITHlyQU9PdlpIem1IYjNXUFM0TDhIaEVx?= =?utf-8?B?K2k5a05iRks1Y1NPaWw2dG44WlA0NU8yNGFBQ1hPWll1dnJMOXBCeG5NSUJY?= =?utf-8?B?bng2MUNTNStkb2lTVXI5Nmw5U1ZRQXhyK0xLWVptUWNDbkwxVzJtN3d4V20y?= =?utf-8?Q?Eo3y/Hi9dgXFsmmIeVNLwz54t0ZymsDn6Dg/A=3D?= 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:(13230031)(35042699013)(82310400017)(36860700004)(376005)(1800799015);DIR:OUT;SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 May 2024 14:57:37.9988 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3499f53e-f191-4630-fb10-08dc81820348 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: AMS1EPF00000044.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU0PR08MB8018 The 05/03/2024 14:01, Joey Gouly wrote: > Implement the PKEYS interface, using the Permission Overlay Extension. ... > +#ifdef CONFIG_ARCH_HAS_PKEYS > +int arch_set_user_pkey_access(struct task_struct *tsk, int pkey, unsigned long init_val) > +{ > + u64 new_por = POE_RXW; > + u64 old_por; > + u64 pkey_shift; > + > + if (!arch_pkeys_enabled()) > + return -ENOSPC; > + > + /* > + * This code should only be called with valid 'pkey' > + * values originating from in-kernel users. Complain > + * if a bad value is observed. > + */ > + if (WARN_ON_ONCE(pkey >= arch_max_pkey())) > + return -EINVAL; > + > + /* Set the bits we need in POR: */ > + if (init_val & PKEY_DISABLE_ACCESS) > + new_por = POE_X; > + else if (init_val & PKEY_DISABLE_WRITE) > + new_por = POE_RX; > + given that the architecture allows r,w,x permissions to be set independently, should we have a 'PKEY_DISABLE_EXEC' or similar api flag? (on other targets it can be some invalid value that fails) > + /* Shift the bits in to the correct place in POR for pkey: */ > + pkey_shift = pkey * POR_BITS_PER_PKEY; > + new_por <<= pkey_shift; > + > + /* Get old POR and mask off any old bits in place: */ > + old_por = read_sysreg_s(SYS_POR_EL0); > + old_por &= ~(POE_MASK << pkey_shift); > + > + /* Write old part along with new part: */ > + write_sysreg_s(old_por | new_por, SYS_POR_EL0); > + > + return 0; > +} > +#endif > -- > 2.25.1 > 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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4BDD6C25B75 for ; Fri, 31 May 2024 14:59:01 +0000 (UTC) Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=selector1 header.b=IiFRUDpc; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=selector1 header.b=IiFRUDpc; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4VrR8g3b0wz3fK3 for ; Sat, 1 Jun 2024 00:58:59 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=selector1 header.b=IiFRUDpc; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=selector1 header.b=IiFRUDpc; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=arm.com (client-ip=2a01:111:f403:2608::600; helo=eur02-db5-obe.outbound.protection.outlook.com; envelope-from=szabolcs.nagy@arm.com; receiver=lists.ozlabs.org) Received: from EUR02-DB5-obe.outbound.protection.outlook.com (mail-db5eur02on20600.outbound.protection.outlook.com [IPv6:2a01:111:f403:2608::600]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4VrR7n5CnHz2xjM for ; Sat, 1 Jun 2024 00:58:09 +1000 (AEST) ARC-Seal: i=2; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=pass; b=BWLgi3w4cCxoidODGSFq9SMVcYKjBf5eK7koMLSshiAQiTvoRHi6LNa0qqz0pw/qTvd81lxlINV7ovEPc94trX2cVnRTlBbDkVIUVPoLLUahcMTEM+oWzlB+ojimg/QxzDzdC9xTV3k8rSXIS3Li36Usuj7kx5ydoq+FrVNhZyaWQTp+6dyeT2KF7PmH6ufBI7vTjKG+ZxQl/RPEgV0KujLlsiKCkLThf58evRswqgbzmgS7L8TpVKDVg9KBGLzXCIpLee3wot4j2BjJTMaxDHrA+Keb/vBuUcB58un6MleH0eGyo3aShyRtkLbt43PauEzeXbNVJTYOInDYN5n1tw== 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=6fyDs3nrP7CF6zSQzwHD0RccZ+CrYXNXayMa/mBSk0g=; b=JCIuuD/NZceAOf5K7zathimnBSUl8qmg3Vpv+HJqtHi67r2ATSKTEhHv2oyX/BqlijeBuCnFC9P2crCr7l0fafcPsc0cc/ufsjrP7iRVH0MV3vyqcY6S6KRFKFJmZl5qp55Hp7xAR5mRmV/7i1i3+TnNFbBCiM6vto1hBXHqoUvGzd/6ZtuD5KfWmrttUkJYSCkJqnSFCIsgFaVkxYyX1+vn8TGXo4FAob1VcThfEZcELzWaEBSia2rZx7CM7UWrFpxgiCaM8E5D6T7qn8zrvopOdiExvIyiT2EwdYr0cl1ZZNLVOxRj7U0VYJaYBnGlqbeAGGfYoYN6Pm5lQ30SKA== ARC-Authentication-Results: i=2; mx.microsoft.com 1; spf=pass (sender ip is 63.35.35.123) smtp.rcpttodomain=lists.ozlabs.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=6fyDs3nrP7CF6zSQzwHD0RccZ+CrYXNXayMa/mBSk0g=; b=IiFRUDpcAVoQiNqUAO6+YUVP28VgWDAgnBJk/bjpu7IrR41eM5mlIRVIDLFw4OSVdW7r1hZIcTeYKkcEvhubQYWV3S79pivfEMz9ecfqzP+igu06pGpQQ+t+tXCoBtDiMO4oYxZ6sZecUBrffbsvkHsvZwqrvHtpd6PtwZbRhQ4= Received: from AM6P192CA0025.EURP192.PROD.OUTLOOK.COM (2603:10a6:209:83::38) by DU2PR08MB10013.eurprd08.prod.outlook.com (2603:10a6:10:49c::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7633.24; Fri, 31 May 2024 14:57:39 +0000 Received: from AM3PEPF0000A795.eurprd04.prod.outlook.com (2603:10a6:209:83:cafe::61) by AM6P192CA0025.outlook.office365.com (2603:10a6:209:83::38) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7633.24 via Frontend Transport; Fri, 31 May 2024 14:57:38 +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 AM3PEPF0000A795.mail.protection.outlook.com (10.167.16.100) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.7633.15 via Frontend Transport; Fri, 31 May 2024 14:57:37 +0000 Received: ("Tessian outbound c5e515ac9ee1:v327"); Fri, 31 May 2024 14:57:37 +0000 X-CheckRecipientChecked: true X-CR-MTA-CID: 49ef7dee730dc2c4 X-CR-MTA-TID: 64aa7808 Received: from fc581970f3d6.2 by 64aa7808-outbound-1.mta.getcheckrecipient.com id 1E6A01C6-4485-48B4-8D7B-C3E38CBB81D0.1; Fri, 31 May 2024 14:57:25 +0000 Received: from EUR03-DBA-obe.outbound.protection.outlook.com by 64aa7808-outbound-1.mta.getcheckrecipient.com with ESMTPS id fc581970f3d6.2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384); Fri, 31 May 2024 14:57:25 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=T0zbFUfBg9hBCu5I7UuAQOt2hZgHE4XAaWcejDMciIRajACWh7VtW5IecIZqlKq0GxUkk9mN2Ll1YeGJZzcuYMxSZsBPuv5VdeXX2YVTcAnkrpWRasOApOeXG0t9mRYQnY8p9pa6TVgM1Y7+aud9GissT89mPEn61yAteACBFV03oMyPsHX1ZqypRdf99gm/xLhedX8ysDO/pdDU0/y/wpaiAp+vC8drYlWsjJ76yvbafwcYBDuV7fFwJFaMLbemu1GhZcN6z2Wx33pBxbYHiA5v5upOSGeXoYhJBq82shjGu8NlVHsuS2gvrIrxkw2XIhMQ5n0VpJ1tWIQnAW5h6g== 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=6fyDs3nrP7CF6zSQzwHD0RccZ+CrYXNXayMa/mBSk0g=; b=LwwPKJSPjI1C7cvCPSzgMNnVsT6Ee00ZCwhhjhxi3758/B90BaZYzPt41tfHYBhlmfirLF63LgNASUiL495LiGF2sXy+qLZWmrxN83UieX3EQkm888eUWoylwpLTcpsbZTGDu+/1CPKQlSZWzlK5Q8VEblHjIK6EYW5ErY911hAhH/x1U6KwLPNwaT5VU6hW5CRdEyI97o9KL0jZMO0HoD7lyCBSCrgjgSOYwPGv5R02tM5uJoEj5AZ0OF4dHA7IgVbSmNmo6vg7NU5LbpUbtdZvWrpQBHy71T9ggHZ34cXtz6VPdjZx4CkMVA1e1edq7d1PoFWKm7Caz6JG1qt8pg== 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=6fyDs3nrP7CF6zSQzwHD0RccZ+CrYXNXayMa/mBSk0g=; b=IiFRUDpcAVoQiNqUAO6+YUVP28VgWDAgnBJk/bjpu7IrR41eM5mlIRVIDLFw4OSVdW7r1hZIcTeYKkcEvhubQYWV3S79pivfEMz9ecfqzP+igu06pGpQQ+t+tXCoBtDiMO4oYxZ6sZecUBrffbsvkHsvZwqrvHtpd6PtwZbRhQ4= 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 AS8PR08MB9147.eurprd08.prod.outlook.com (2603:10a6:20b:57e::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7587.35; Fri, 31 May 2024 14:57:22 +0000 Received: from DB9PR08MB7179.eurprd08.prod.outlook.com ([fe80::7d7e:3788:b094:b809]) by DB9PR08MB7179.eurprd08.prod.outlook.com ([fe80::7d7e:3788:b094:b809%5]) with mapi id 15.20.7587.035; Fri, 31 May 2024 14:57:22 +0000 Date: Fri, 31 May 2024 15:57:07 +0100 From: Szabolcs Nagy To: Joey Gouly , linux-arm-kernel@lists.infradead.org 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> Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20240503130147.1154804-18-joey.gouly@arm.com> X-ClientProxiedBy: LO4P123CA0165.GBRP123.PROD.OUTLOOK.COM (2603:10a6:600:18a::8) To DB9PR08MB7179.eurprd08.prod.outlook.com (2603:10a6:10:2cc::19) MIME-Version: 1.0 X-MS-TrafficTypeDiagnostic: DB9PR08MB7179:EE_|AS8PR08MB9147:EE_|AM3PEPF0000A795:EE_|DU2PR08MB10013:EE_ X-MS-Office365-Filtering-Correlation-Id: 5b2309eb-6197-4eda-6c5b-08dc81820344 x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0;ARA:13230031|376005|366007|7416005|1800799015; X-Microsoft-Antispam-Message-Info-Original: =?utf-8?B?U1psQmpTR1pkQ3FDekdlVXNGNFBrQ1FOTXpsT0hHZ1N5OEhpeUpGeVhXNXY2?= =?utf-8?B?WGFMWnZGT3Fza1B0b3V4Ulg2bWE4SHZocHM3UkJoS3BXVEdURVpyMW1VNThQ?= =?utf-8?B?d3RibEFrV0xVSUVUdHNCNUxjZitXQWlhSnBkV2dNTFNzZXAwTEFZbHh2QXB5?= =?utf-8?B?aXhyTEJ5a0hPWUpCUnJDYzhnNUptSnhwZ2tWSVVmdGhLZldJaE5sV2xrS0FN?= =?utf-8?B?MVRHVlJUUHV2NDBxcDRMaHNyWTlneTByZFVuZnhxbGNrTTNSSGJDY2p3ZHpU?= =?utf-8?B?eVVkejlrL1dPRzRra1FwbjRyMGRpWFVyZ2wrLzNQNS9ZZEtSQnl0Qy9kLy82?= =?utf-8?B?aEorR1dHSFZKSjRkYStJQXF5eUVqaWRvalQ1SnpKZFlHcU9JUTF3VHRCM2dq?= =?utf-8?B?YVdjVHU0bkFXV1R4VnFGa0FkL1dtMUJ4MXB2NU9Yc3VwM003WjQrRWo4L3E2?= =?utf-8?B?NEJLdUtVenROUFQ4V0VySWVRNVUrTldVdHBwUUd3MEg2blU1QmN3OVN4SDcx?= =?utf-8?B?ZmhucTR6ZUg0MmNlSG1ia05VVVpEU3ltMnhLbFdWT0h1b1BMWFhOMnMrYVFL?= =?utf-8?B?dzNPQVVjYWRBZlJacnlyeFpWejB1UzFZUCsvSTdkVnNqbHlLT0NzS054Z0c2?= =?utf-8?B?L1BEWjk2Zm1UVkVVZ0E5bFlDQy9HZG5HUmQ2Smc2UzBaK2VPcEwvaVkwV1Z4?= =?utf-8?B?ZFVYUHBxOUgyZ1NzVG1QSDRVbnF6TFVNVXN2aHdQcURGWmJ2dVprcTNkb3U0?= =?utf-8?B?WU1Mc21KNVRwT29zNmMyc3JPWlJtWCs2MzE4VzUwbVU1b0dqNU5CbWFlbDBX?= =?utf-8?B?a2pjRFVkTXNWWVlCcGFFeFBDWnh2ZjljT3NsRkRXcGk4WnhvVHkrckZFME9w?= =?utf-8?B?cTc4OGJnS2pTdHg1QnFxaXFJZ1Jua1RtbUZyaXZldjRrZ1Z0Z20zRTdWY0Jx?= =?utf-8?B?L28yeFlRVVBpREtXT3N2ZklTdUYveXRzbEJ2RUVWSHJLc1ZLczlma1NmZWVy?= =?utf-8?B?SDN4ZnIxYkd4VEE0bFBEZE9uMmhhOEVsRE1RNHdWSnErelRsRGJPV21PWk1m?= =?utf-8?B?WVVwdnAvME9hR3VEenBZV0JvM3hwTnFtMEd6Y2o5NHZVOXQzVTFpQVViVUhI?= =?utf-8?B?eHorVkNZR3MyU1l0L0RIdE1uUFl4QzhxTHh6VzVYSW5QMWt1am5MeEJpOHVk?= =?utf-8?B?TUJiMjRoazliNURpaCtVc3pCUmQ1OFdweThRUkk2M3FLemJjSDIzeFQ5ZERP?= =?utf-8?B?eFhUV2IxNEY1TWhaOXBJWEpnYU95bUUxdTVIc1JNbzJGZEx1MllrMXhUQ3Fi?= =?utf-8?B?UmRQSjhwcTNDYnVXQTRRcXE4N0EvaVRhaDFYL2hGTG1TanIxQ0pOelZ5N1lT?= =?utf-8?B?Sld5aEJUSzlmWVV6ZHdzL09OYnhGZHJGMzVaV3VnRDVPajUvYnVTM2lwaEM1?= =?utf-8?B?Y3ZoTUVZejgvUWdPdG5CWGZ0dXhXdGtITHlKQ2VMTDcrQmJ4ZnZ6VkNXUFl6?= =?utf-8?B?MExwRVdjRG84a2tRUFFWbVBvUndWNnB1NXhwRUVxZkNkY1I0dlluUkRKRFVF?= =?utf-8?B?V0NLa1B6cmpOa3oxQjBmRWVibTQ5b0dFa0RtdnBnMzE1c3IzTTlPbkR5SFNP?= =?utf-8?B?WkNnOStDM1k2VzZJL0xGcHMyWmpJMG9kQXVobkxxY0RmcEVtM1ovUGFIZUtj?= =?utf-8?B?K2x1a3JBbkxwVC9taXI5R2NyYkYycGx6bGlxV1RjRlpFMjRxc1IyR1N3PT0=?= 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:(13230031)(376005)(366007)(7416005)(1800799015);DIR:OUT;SFP:1101; X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR08MB9147 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: AM3PEPF0000A795.eurprd04.prod.outlook.com X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id-Prvs: 1174fe25-a175-4ede-f27f-08dc8181f9f1 X-Microsoft-Antispam: BCL:0;ARA:13230031|82310400017|36860700004|376005|1800799015|35042699013; X-Microsoft-Antispam-Message-Info: =?utf-8?B?TVB3emNqMmJVVFdtdVo2MlVFMEUvWXdhTkRpMmR1eGtkODJRa0lNU1dQVStn?= =?utf-8?B?VEFGcFZzS210MjMvbHFFMFRTV0MzZkl4N1RmMDRYR2FDbnlJSDJkSWl2WjNX?= =?utf-8?B?U2tsSFozT1ZRTTNVNGhhNHpEQjBnVERuNVhyZ0x1SVFVUlNGS2xaUTJFNVpv?= =?utf-8?B?ajB3VC9HTTNPaWVOeCtCYW15MGtOT0t4TTdUSUh4aWJOdUdzeDhHMFIvRno1?= =?utf-8?B?VThydzh2MTlqeUozR0l5cExodlVMbG5QQjkwL2NiTTgvN3o3L3QvK2RqdTZn?= =?utf-8?B?VTRxUFBIUk1ROEJBbHlKcE1SZjkrazYxWFpib2JvSVAxQzNxK2dYQytOR244?= =?utf-8?B?MGs1d0VSaS9aWTZ4bXlsKy9FeDBMN2xQZ3crYkJxZXFKUW9ham1wT1ArUlZO?= =?utf-8?B?YWNPZXZJU0ZuNnBkd3J0bU1qMktSTEhQUlBXQ1MvUlZFdEowaEZSUE1QUTlB?= =?utf-8?B?RWExQmRJK3N3cDdXUEZSd05LZEU2dm5vWmRXb01tSFo1TDdKblJKelhTaEty?= =?utf-8?B?cFlHYnp4ZzJuWkNpemFKWW1qbUR3N2k3Z213dk5aNDJudXJXZk44MmtZdGJq?= =?utf-8?B?SkdZUUczN2Q2ZUZnUitqR3JoMVU4ZDRiQ3FQUWRrd0NMdE5zQmxRSTlCbG90?= =?utf-8?B?Unpqb0dDTGVEcFNoaVB4NUFNZElvT1F1YVVJdUl5cE82YU9jQzVQblVPTHFk?= =?utf-8?B?cTIvUGc1ZEZlZk96NW9HZVhrZEdOSUwxRks1MXRqcTNRQzBhWGFjKzRiSFpV?= =?utf-8?B?T2xnYkkzNjRtcG9iT2tibTk0anVqN3RHWHByRGFHN2pXN1hlcUp5VjVYWXdG?= =?utf-8?B?cjJsU2VWUmltTUl3bWVnbGd2VkJMb1VkSDU0bjFKL3V3dGdQZi9JQzJJello?= =?utf-8?B?QXBKNHBWMHZVQmRFNUN5aXBRR25tZjR6QlhZbncxb2xuN1YwVXp1c2xHaC9G?= =?utf-8?B?MWlCeGpzVHVWZFRTWmluQW9sOFBSTzZJdGUvYmRMdlp4WnpyWlFMeTd3UXJx?= =?utf-8?B?RkFIVkpsOGk5dTlwTjgxZVdQS2IxbzM3bGRzUE01WW56OWlJMnV4ajBJWXdY?= =?utf-8?B?cFNUS1RmdVBGUUt4OURIcm5XV3VkakFrZW5YM3JxRk80RXRnM0Ztc0hmaDBj?= =?utf-8?B?TlpBcUVRTHNLS09GSmw4cGp3N0JTZ09CVDRMdlhGQlF5SEc5VWl1VDdXVVF6?= =?utf-8?B?VTNDTU1HUG9EajFMbEdXRVMvU2lmaGRHdW00dEhMOGduM1FVNVBxTFpBbVdy?= =?utf-8?B?L2ErVnVjT052TitPbmJHU2xIV0QxZ3VhakFiSGZzWUJYcEFHdmQ2NmJ6dlFI?= =?utf-8?B?Y2t0NkhVTCtFYWVpcE53VENZSU11dE9FNjJ5dmJHUHBjdzlFOWhQbXo0TTYx?= =?utf-8?B?Rmg0WGJLLzZUM2pLZUZuSEJLN2JPT08zekl1UlRNRy9yUVQ4Q3hta1VUODBu?= =?utf-8?B?RURRWEFRR1lWY1MzOWJPWlIyYzJsYUM2ZlFrZEtVTG1CVjhoZXI5T0dGTFQ0?= =?utf-8?B?aFRoeGNYNURpc0srV3ZCRUcxZXg2UktsOVkrQnA5UGN2bGt1aFFmeUYrSDdF?= =?utf-8?B?SFdIU1dOTEs2RmRTNkllN3FKTytpSWZTZFNicFVBcE9mK0VSWVdxMFd2dGJX?= =?utf-8?B?b0tpVFRHUzZxL1FvOThWVlJnc05pbkJTYjhXZ2M2Z1kraG5aWmJhZ2Z0bnp6?= =?utf-8?B?QVo0NlI4WkE2ZEhPSGQ3NWJZODN2bUNhdUhlY1ZrTmlNSjNVeER5SWk1WjNL?= =?utf-8?B?cHZOZ3JpVXlleHBnQTdPZjAxSENMYWhpb0ZzcHJyay85NUZ1aGtVK1NIZ2xq?= =?utf-8?Q?WCUSjjPF5gDRo07WQHiKS6ICwdCKLZpb4GvhE=3D?= 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:(13230031)(82310400017)(36860700004)(376005)(1800799015)(35042699013);DIR:OUT;SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 May 2024 14:57:37.9846 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5b2309eb-6197-4eda-6c5b-08dc81820344 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: AM3PEPF0000A795.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU2PR08MB10013 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: catalin.marinas@arm.com, dave.hansen@linux.intel.com, linux-mm@kvack.org, hpa@zytor.com, shuah@kernel.org, maz@kernel.org, x86@kernel.org, aneesh.kumar@kernel.org, mingo@redhat.com, naveen.n.rao@linux.ibm.com, will@kernel.org, npiggin@gmail.com, broonie@kernel.org, bp@alien8.de, kvmarm@lists.linux.dev, tglx@linutronix.de, oliver.upton@linux.dev, aneesh.kumar@linux.ibm.com, linux-fsdevel@vger.kernel.org, akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" The 05/03/2024 14:01, Joey Gouly wrote: > Implement the PKEYS interface, using the Permission Overlay Extension. ... > +#ifdef CONFIG_ARCH_HAS_PKEYS > +int arch_set_user_pkey_access(struct task_struct *tsk, int pkey, unsigned long init_val) > +{ > + u64 new_por = POE_RXW; > + u64 old_por; > + u64 pkey_shift; > + > + if (!arch_pkeys_enabled()) > + return -ENOSPC; > + > + /* > + * This code should only be called with valid 'pkey' > + * values originating from in-kernel users. Complain > + * if a bad value is observed. > + */ > + if (WARN_ON_ONCE(pkey >= arch_max_pkey())) > + return -EINVAL; > + > + /* Set the bits we need in POR: */ > + if (init_val & PKEY_DISABLE_ACCESS) > + new_por = POE_X; > + else if (init_val & PKEY_DISABLE_WRITE) > + new_por = POE_RX; > + given that the architecture allows r,w,x permissions to be set independently, should we have a 'PKEY_DISABLE_EXEC' or similar api flag? (on other targets it can be some invalid value that fails) > + /* Shift the bits in to the correct place in POR for pkey: */ > + pkey_shift = pkey * POR_BITS_PER_PKEY; > + new_por <<= pkey_shift; > + > + /* Get old POR and mask off any old bits in place: */ > + old_por = read_sysreg_s(SYS_POR_EL0); > + old_por &= ~(POE_MASK << pkey_shift); > + > + /* Write old part along with new part: */ > + write_sysreg_s(old_por | new_por, SYS_POR_EL0); > + > + return 0; > +} > +#endif > -- > 2.25.1 > 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2CEA2C25B7E for ; Fri, 31 May 2024 14:58:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:In-Reply-To:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=uuQeXsunakvmfLg2Si20atRY3c+OF06YzhyDqkb19os=; b=y/XmvqukGTC7rE iFgVmVpErSfGQ8sBi2h+cRb9ZR7BN87VAK4pKbXaabxgPJP4S/dE6opaMlgv1N+zTuppU3V+l2fKN f0r/2aPruNgwHGAAcX8Fb7f5NmnLW7w90cJklrhs9tQbFoFqKWt/4xmt9fd1/iD/o4m3hao03RPXO U6B//ZrKyPSgZKh6Spi6Q2Kt2tZCb7n02Ur3R4wY+h+ZNrHS19+3oJuZdNbqZDrJFK56xJIlnT4+X ggSi3mLa7t+yZ+2xZ3USVzq8eULOxM/d56Uk/zmKMQ1IpHTE+hnde7Mg1ADFgdShkKagoW/3HYkpO 7ktWq3ixErmU/VOlx91Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sD3hs-0000000AaK8-0vRz; Fri, 31 May 2024 14:58:12 +0000 Received: from mail-he1eur01on0630.outbound.protection.outlook.com ([2a01:111:f400:fe1e::630] helo=EUR01-HE1-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sD3ho-0000000AaHw-45wY for linux-arm-kernel@lists.infradead.org; Fri, 31 May 2024 14:58:11 +0000 ARC-Seal: i=2; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=pass; b=bLvI1njei/M5OLNivsabVwoD8PzaGNwaWB+miRLWd1XGZq5ftCJiAgzJxhz3cina5sUwQq1FQHQYuV/I3FcVAAl66TNwf5BgED6OkcTAmxyJW2GTZu4lSXOnlFYY/Tx3p6/QInTs8i+06Lv3vSxzpI/RllW5wuTj4KjOLs7bX13VAnd8QSd0slelo6mh7p0CY7XlYK4JCz6THk2MKJWR1h3igTRfnZKJsnqQvYu5fBpC05dEA/ulG3oP/EoQMZBLaVhL9YwYGZ5bdGD0NpcopBRRuS7AyHLgG/WyBdanZYp7US0F9m7tjEucJlpDqarG9BCtyM0rlnPRg+5C3xcDIQ== 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=6fyDs3nrP7CF6zSQzwHD0RccZ+CrYXNXayMa/mBSk0g=; b=JCIuuD/NZceAOf5K7zathimnBSUl8qmg3Vpv+HJqtHi67r2ATSKTEhHv2oyX/BqlijeBuCnFC9P2crCr7l0fafcPsc0cc/ufsjrP7iRVH0MV3vyqcY6S6KRFKFJmZl5qp55Hp7xAR5mRmV/7i1i3+TnNFbBCiM6vto1hBXHqoUvGzd/6ZtuD5KfWmrttUkJYSCkJqnSFCIsgFaVkxYyX1+vn8TGXo4FAob1VcThfEZcELzWaEBSia2rZx7CM7UWrFpxgiCaM8E5D6T7qn8zrvopOdiExvIyiT2EwdYr0cl1ZZNLVOxRj7U0VYJaYBnGlqbeAGGfYoYN6Pm5lQ30SKA== ARC-Authentication-Results: i=2; mx.microsoft.com 1; spf=pass (sender ip is 63.35.35.123) smtp.rcpttodomain=lists.infradead.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=6fyDs3nrP7CF6zSQzwHD0RccZ+CrYXNXayMa/mBSk0g=; b=IiFRUDpcAVoQiNqUAO6+YUVP28VgWDAgnBJk/bjpu7IrR41eM5mlIRVIDLFw4OSVdW7r1hZIcTeYKkcEvhubQYWV3S79pivfEMz9ecfqzP+igu06pGpQQ+t+tXCoBtDiMO4oYxZ6sZecUBrffbsvkHsvZwqrvHtpd6PtwZbRhQ4= Received: from AM9P250CA0005.EURP250.PROD.OUTLOOK.COM (2603:10a6:20b:21c::10) by AS1PR08MB7657.eurprd08.prod.outlook.com (2603:10a6:20b:478::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7633.21; Fri, 31 May 2024 14:57:38 +0000 Received: from AMS0EPF000001B6.eurprd05.prod.outlook.com (2603:10a6:20b:21c:cafe::5a) by AM9P250CA0005.outlook.office365.com (2603:10a6:20b:21c::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7633.19 via Frontend Transport; Fri, 31 May 2024 14:57:38 +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 AMS0EPF000001B6.mail.protection.outlook.com (10.167.16.170) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.7633.15 via Frontend Transport; Fri, 31 May 2024 14:57:38 +0000 Received: ("Tessian outbound c5e515ac9ee1:v327"); Fri, 31 May 2024 14:57:37 +0000 X-CheckRecipientChecked: true X-CR-MTA-CID: 49ef7dee730dc2c4 X-CR-MTA-TID: 64aa7808 Received: from fc581970f3d6.2 by 64aa7808-outbound-1.mta.getcheckrecipient.com id 1E6A01C6-4485-48B4-8D7B-C3E38CBB81D0.1; Fri, 31 May 2024 14:57:25 +0000 Received: from EUR03-DBA-obe.outbound.protection.outlook.com by 64aa7808-outbound-1.mta.getcheckrecipient.com with ESMTPS id fc581970f3d6.2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384); Fri, 31 May 2024 14:57:25 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=T0zbFUfBg9hBCu5I7UuAQOt2hZgHE4XAaWcejDMciIRajACWh7VtW5IecIZqlKq0GxUkk9mN2Ll1YeGJZzcuYMxSZsBPuv5VdeXX2YVTcAnkrpWRasOApOeXG0t9mRYQnY8p9pa6TVgM1Y7+aud9GissT89mPEn61yAteACBFV03oMyPsHX1ZqypRdf99gm/xLhedX8ysDO/pdDU0/y/wpaiAp+vC8drYlWsjJ76yvbafwcYBDuV7fFwJFaMLbemu1GhZcN6z2Wx33pBxbYHiA5v5upOSGeXoYhJBq82shjGu8NlVHsuS2gvrIrxkw2XIhMQ5n0VpJ1tWIQnAW5h6g== 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=6fyDs3nrP7CF6zSQzwHD0RccZ+CrYXNXayMa/mBSk0g=; b=LwwPKJSPjI1C7cvCPSzgMNnVsT6Ee00ZCwhhjhxi3758/B90BaZYzPt41tfHYBhlmfirLF63LgNASUiL495LiGF2sXy+qLZWmrxN83UieX3EQkm888eUWoylwpLTcpsbZTGDu+/1CPKQlSZWzlK5Q8VEblHjIK6EYW5ErY911hAhH/x1U6KwLPNwaT5VU6hW5CRdEyI97o9KL0jZMO0HoD7lyCBSCrgjgSOYwPGv5R02tM5uJoEj5AZ0OF4dHA7IgVbSmNmo6vg7NU5LbpUbtdZvWrpQBHy71T9ggHZ34cXtz6VPdjZx4CkMVA1e1edq7d1PoFWKm7Caz6JG1qt8pg== 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=6fyDs3nrP7CF6zSQzwHD0RccZ+CrYXNXayMa/mBSk0g=; b=IiFRUDpcAVoQiNqUAO6+YUVP28VgWDAgnBJk/bjpu7IrR41eM5mlIRVIDLFw4OSVdW7r1hZIcTeYKkcEvhubQYWV3S79pivfEMz9ecfqzP+igu06pGpQQ+t+tXCoBtDiMO4oYxZ6sZecUBrffbsvkHsvZwqrvHtpd6PtwZbRhQ4= 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 AS8PR08MB9147.eurprd08.prod.outlook.com (2603:10a6:20b:57e::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7587.35; Fri, 31 May 2024 14:57:22 +0000 Received: from DB9PR08MB7179.eurprd08.prod.outlook.com ([fe80::7d7e:3788:b094:b809]) by DB9PR08MB7179.eurprd08.prod.outlook.com ([fe80::7d7e:3788:b094:b809%5]) with mapi id 15.20.7587.035; Fri, 31 May 2024 14:57:22 +0000 Date: Fri, 31 May 2024 15:57:07 +0100 From: Szabolcs Nagy To: Joey Gouly , linux-arm-kernel@lists.infradead.org Cc: 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, dave.hansen@linux.intel.com, 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> Content-Disposition: inline In-Reply-To: <20240503130147.1154804-18-joey.gouly@arm.com> X-ClientProxiedBy: LO4P123CA0165.GBRP123.PROD.OUTLOOK.COM (2603:10a6:600:18a::8) To DB9PR08MB7179.eurprd08.prod.outlook.com (2603:10a6:10:2cc::19) MIME-Version: 1.0 X-MS-TrafficTypeDiagnostic: DB9PR08MB7179:EE_|AS8PR08MB9147:EE_|AMS0EPF000001B6:EE_|AS1PR08MB7657:EE_ X-MS-Office365-Filtering-Correlation-Id: 75f5f0e2-1196-4e5a-6704-08dc81820347 x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0;ARA:13230031|376005|366007|7416005|1800799015; X-Microsoft-Antispam-Message-Info-Original: =?utf-8?B?U1psQmpTR1pkQ3FDekdlVXNGNFBrQ1FOTXpsT0hHZ1N5OEhpeUpGeVhXNXY2?= =?utf-8?B?WGFMWnZGT3Fza1B0b3V4Ulg2bWE4SHZocHM3UkJoS3BXVEdURVpyMW1VNThQ?= =?utf-8?B?d3RibEFrV0xVSUVUdHNCNUxjZitXQWlhSnBkV2dNTFNzZXAwTEFZbHh2QXB5?= =?utf-8?B?aXhyTEJ5a0hPWUpCUnJDYzhnNUptSnhwZ2tWSVVmdGhLZldJaE5sV2xrS0FN?= =?utf-8?B?MVRHVlJUUHV2NDBxcDRMaHNyWTlneTByZFVuZnhxbGNrTTNSSGJDY2p3ZHpU?= =?utf-8?B?eVVkejlrL1dPRzRra1FwbjRyMGRpWFVyZ2wrLzNQNS9ZZEtSQnl0Qy9kLy82?= =?utf-8?B?aEorR1dHSFZKSjRkYStJQXF5eUVqaWRvalQ1SnpKZFlHcU9JUTF3VHRCM2dq?= =?utf-8?B?YVdjVHU0bkFXV1R4VnFGa0FkL1dtMUJ4MXB2NU9Yc3VwM003WjQrRWo4L3E2?= =?utf-8?B?NEJLdUtVenROUFQ4V0VySWVRNVUrTldVdHBwUUd3MEg2blU1QmN3OVN4SDcx?= =?utf-8?B?ZmhucTR6ZUg0MmNlSG1ia05VVVpEU3ltMnhLbFdWT0h1b1BMWFhOMnMrYVFL?= =?utf-8?B?dzNPQVVjYWRBZlJacnlyeFpWejB1UzFZUCsvSTdkVnNqbHlLT0NzS054Z0c2?= =?utf-8?B?L1BEWjk2Zm1UVkVVZ0E5bFlDQy9HZG5HUmQ2Smc2UzBaK2VPcEwvaVkwV1Z4?= =?utf-8?B?ZFVYUHBxOUgyZ1NzVG1QSDRVbnF6TFVNVXN2aHdQcURGWmJ2dVprcTNkb3U0?= =?utf-8?B?WU1Mc21KNVRwT29zNmMyc3JPWlJtWCs2MzE4VzUwbVU1b0dqNU5CbWFlbDBX?= =?utf-8?B?a2pjRFVkTXNWWVlCcGFFeFBDWnh2ZjljT3NsRkRXcGk4WnhvVHkrckZFME9w?= =?utf-8?B?cTc4OGJnS2pTdHg1QnFxaXFJZ1Jua1RtbUZyaXZldjRrZ1Z0Z20zRTdWY0Jx?= =?utf-8?B?L28yeFlRVVBpREtXT3N2ZklTdUYveXRzbEJ2RUVWSHJLc1ZLczlma1NmZWVy?= =?utf-8?B?SDN4ZnIxYkd4VEE0bFBEZE9uMmhhOEVsRE1RNHdWSnErelRsRGJPV21PWk1m?= =?utf-8?B?WVVwdnAvME9hR3VEenBZV0JvM3hwTnFtMEd6Y2o5NHZVOXQzVTFpQVViVUhI?= =?utf-8?B?eHorVkNZR3MyU1l0L0RIdE1uUFl4QzhxTHh6VzVYSW5QMWt1am5MeEJpOHVk?= =?utf-8?B?TUJiMjRoazliNURpaCtVc3pCUmQ1OFdweThRUkk2M3FLemJjSDIzeFQ5ZERP?= =?utf-8?B?eFhUV2IxNEY1TWhaOXBJWEpnYU95bUUxdTVIc1JNbzJGZEx1MllrMXhUQ3Fi?= =?utf-8?B?UmRQSjhwcTNDYnVXQTRRcXE4N0EvaVRhaDFYL2hGTG1TanIxQ0pOelZ5N1lT?= =?utf-8?B?Sld5aEJUSzlmWVV6ZHdzL09OYnhGZHJGMzVaV3VnRDVPajUvYnVTM2lwaEM1?= =?utf-8?B?Y3ZoTUVZejgvUWdPdG5CWGZ0dXhXdGtITHlKQ2VMTDcrQmJ4ZnZ6VkNXUFl6?= =?utf-8?B?MExwRVdjRG84a2tRUFFWbVBvUndWNnB1NXhwRUVxZkNkY1I0dlluUkRKRFVF?= =?utf-8?B?V0NLa1B6cmpOa3oxQjBmRWVibTQ5b0dFa0RtdnBnMzE1c3IzTTlPbkR5SFNP?= =?utf-8?B?WkNnOStDM1k2VzZJL0xGcHMyWmpJMG9kQXVobkxxY0RmcEVtM1ovUGFIZUtj?= =?utf-8?B?K2x1a3JBbkxwVC9taXI5R2NyYkYycGx6bGlxV1RjRlpFMjRxc1IyR1N3PT0=?= 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:(13230031)(376005)(366007)(7416005)(1800799015);DIR:OUT;SFP:1101; X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR08MB9147 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: AMS0EPF000001B6.eurprd05.prod.outlook.com X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id-Prvs: 1174fe25-a175-4ede-f27f-08dc8181f9f1 X-Microsoft-Antispam: BCL:0;ARA:13230031|376005|36860700004|1800799015|82310400017|35042699013; X-Microsoft-Antispam-Message-Info: =?utf-8?B?Z2hzbldOczI0SzUxSDNBdi9YWVEvQ1I4NzFnTDdqSVhUQkNWRWVqNDlQSG84?= =?utf-8?B?S21HT3lrK3Jqa3NzNm9HWGZNOVRlaG1vdU9oeXpoR0JkSk55UU9WVnZlWmZx?= =?utf-8?B?R1NWOVd2WXJURytPTW1Fa25uZmIwVmpmeEEyc0QxMVBtYVJUb2QyL0FOVGpC?= =?utf-8?B?cjY1T0ZteDIvQXErdTNXQitRcU45UlZBVmZud1gxRmFxcVNScEd3TnoxRU1O?= =?utf-8?B?MkZTV0MxRFJsN2tlWUFxV3ZmanVQYXB0YWUzV3B1WndjMmpKM3AwYlFXSGJ6?= =?utf-8?B?UEVQZkNQQlNkdmlYRzd6Vnk5bmFmVDY0VFM1cEFDZFQxMHNHUEJjR0JtMFdG?= =?utf-8?B?c0gxdlpBNDgzVE05eUE0MFU1NEVuYi9jeEdwTFY4QU15THJrOXVqWW45UFBC?= =?utf-8?B?eUgraXR5enZMOUExbjk3b21ndHBiZmQ3QUlqa2k2SDlYOUtxdHBSQ3diMlA3?= =?utf-8?B?VXJ5TjhnRmlRZmhGRGR4S0ZJRFZNc21sZEhFR29mbDVkb0tYWE5QalFVRk5D?= =?utf-8?B?MzN4NkE4THhYNmhqbG53YmF2ajBzWjVFSG94YTAwNTd1bmpqUnh2endwS25m?= =?utf-8?B?QmNnTUU0SXZ0eHNzNERQU0NscmcxOXVyblVYUnBDZ0VTa25LV3N3d08xbkxY?= =?utf-8?B?S1BWWG44cUFFR3JwMzJjUXNpRnpuRWJDSFZGbzh3OGpLMkxIQVg2RmFjVmpt?= =?utf-8?B?NmtJaVRJR05iR3dDTWdyUGZJdXVYQWh4cHZNT1FwVmRhMGpGdXlSR0tSTXho?= =?utf-8?B?aXVSMHM5RWEvVEVnRjJaemE4dGxDNkMwVlkwSHpQdyt2dzc2eU92NDJ1T0tN?= =?utf-8?B?K1BMUHhLZUVza3dUN0lJZWF4Mnk2a1d4dXhzenNTdzM3eStwYXFXbWxIZzBq?= =?utf-8?B?ZWpLQ3lUek5XSVo0OHcxWGE1ZDlwbGJKVXRaelBYOVJhMXk1MTRKa2ExTDlk?= =?utf-8?B?TytZSVE1SGdGSmFSYkpZT1Z1RlRZNU83TmQ2Zm1OYlBYV20zYjkxZHNneXZ2?= =?utf-8?B?MlZqZ2VEMzJmOWlmN2c5dTE2emdsaldzUm5SMUgzZXJwUXVFa1Z4cTNVQlo4?= =?utf-8?B?czJ2cnVIRnpHMkVPOVJ2bXI5ZDZYV2Z3bzRGbUJ1UGx5Znh6YkR5cHpQYUpC?= =?utf-8?B?TjhUd2cvbTlHQjRjdkdMVlBvU0VFM2Zua2wrQlkxSnhxTDM5MmY4dlhKaXlW?= =?utf-8?B?dCtiOG1DUW9iZkVpMTRnb2FRQ2JVMWF6YWVMYkN0T25xMHowOTZqby9TU0pD?= =?utf-8?B?ditETG84ZWwyS0lyUGtvczhmN1hkdjkwOHJRRThFM3Z0WTVCM1VOczJXVDNV?= =?utf-8?B?bXZSMmdZVDF0OWN4M0xaSlR3a292SVpHM2NJTGJld2xxR1pJV29qb2VqVVhF?= =?utf-8?B?cGRGOEJhL2dHWWdBcjVOclF6RGNRT09Rc1pUenpRaHJPQ1ZlMVk5T1p0c2cx?= =?utf-8?B?Rzd5aGJWNllQM3NZZFRuQnA1akdiR0tTMHBiVUt4Uy8xNnRFSHlSc0Y3anNp?= =?utf-8?B?K3pGd21zbE1COVF5VUZwUkZYOVo2M1NoK1VNbityeVNwbEtjZjFzaUwzN2dh?= =?utf-8?B?UHhuZVV2NnlWOUR6YUM3a2pSWFk2NUp2dWZGa2NmbnJBNysrSU12MG5IblZD?= =?utf-8?B?Q1U5WU1pT0pCeElETCtGek5VUFZrL0d6ekNtQVpNYWloK0lvTit3Q1EyU1NW?= =?utf-8?B?Z3pZSU1iRUhqRnk1N1ZVcHRIQXp0SDB6UUNIa00xTXlqQUlmVGZBSEFUbmFF?= =?utf-8?B?cjM3YkYxWEU5MTErZ2haQ0liU1JnZWlJbmRiV05La1pUazI0RWwyTzNuZnlU?= =?utf-8?Q?JzUG7yAw6gWkfLYeYKXGhqufF1B1EZdWFfj/E=3D?= 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:(13230031)(376005)(36860700004)(1800799015)(82310400017)(35042699013);DIR:OUT;SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 May 2024 14:57:38.0041 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 75f5f0e2-1196-4e5a-6704-08dc81820347 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: AMS0EPF000001B6.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS1PR08MB7657 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240531_075809_224506_628E8968 X-CRM114-Status: GOOD ( 16.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The 05/03/2024 14:01, Joey Gouly wrote: > Implement the PKEYS interface, using the Permission Overlay Extension. ... > +#ifdef CONFIG_ARCH_HAS_PKEYS > +int arch_set_user_pkey_access(struct task_struct *tsk, int pkey, unsigned long init_val) > +{ > + u64 new_por = POE_RXW; > + u64 old_por; > + u64 pkey_shift; > + > + if (!arch_pkeys_enabled()) > + return -ENOSPC; > + > + /* > + * This code should only be called with valid 'pkey' > + * values originating from in-kernel users. Complain > + * if a bad value is observed. > + */ > + if (WARN_ON_ONCE(pkey >= arch_max_pkey())) > + return -EINVAL; > + > + /* Set the bits we need in POR: */ > + if (init_val & PKEY_DISABLE_ACCESS) > + new_por = POE_X; > + else if (init_val & PKEY_DISABLE_WRITE) > + new_por = POE_RX; > + given that the architecture allows r,w,x permissions to be set independently, should we have a 'PKEY_DISABLE_EXEC' or similar api flag? (on other targets it can be some invalid value that fails) > + /* Shift the bits in to the correct place in POR for pkey: */ > + pkey_shift = pkey * POR_BITS_PER_PKEY; > + new_por <<= pkey_shift; > + > + /* Get old POR and mask off any old bits in place: */ > + old_por = read_sysreg_s(SYS_POR_EL0); > + old_por &= ~(POE_MASK << pkey_shift); > + > + /* Write old part along with new part: */ > + write_sysreg_s(old_por | new_por, SYS_POR_EL0); > + > + return 0; > +} > +#endif > -- > 2.25.1 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel