From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from EUR05-VI1-obe.outbound.protection.outlook.com (mail-vi1eur05on2079.outbound.protection.outlook.com [40.107.21.79]) (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 DCCFE28EF; Fri, 27 Jan 2023 11:41:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector2-armh-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=SFNQAxSU7XAJtJhJFGLeQLPoIFHCEXEJJzjwvGAuSAo=; b=3KMDKRZwFWb9ItNkbUaQhuGI41XuKkUT4DSbqUMi614rMCTgaTLpG/16qVo9FhAqVB9PWiaMkS2IoI3SkgRMlPVdVQyqiO8MunblxaDgPqKL9scwX6fQPp7N7L9/6bCc/S6T+wHQ3oQyocuLb/a4NW8YzXEALI3bDvXdcWflQPM= Received: from AS9P251CA0002.EURP251.PROD.OUTLOOK.COM (2603:10a6:20b:50f::10) by DB3PR08MB8889.eurprd08.prod.outlook.com (2603:10a6:10:439::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6002.33; Fri, 27 Jan 2023 11:41:55 +0000 Received: from AM7EUR03FT021.eop-EUR03.prod.protection.outlook.com (2603:10a6:20b:50f:cafe::9c) by AS9P251CA0002.outlook.office365.com (2603:10a6:20b:50f::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6043.23 via Frontend Transport; Fri, 27 Jan 2023 11:41:55 +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=armh.onmicrosoft.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 AM7EUR03FT021.mail.protection.outlook.com (100.127.140.243) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6043.22 via Frontend Transport; Fri, 27 Jan 2023 11:41:55 +0000 Received: ("Tessian outbound 333ca28169fa:v132"); Fri, 27 Jan 2023 11:41:55 +0000 X-CheckRecipientChecked: true X-CR-MTA-CID: ec865946f5b87296 X-CR-MTA-TID: 64aa7808 Received: from 496d2b36e9b2.1 by 64aa7808-outbound-1.mta.getcheckrecipient.com id A7413008-086D-4EFF-988E-873B3B9F265B.1; Fri, 27 Jan 2023 11:41:48 +0000 Received: from EUR02-VI1-obe.outbound.protection.outlook.com by 64aa7808-outbound-1.mta.getcheckrecipient.com with ESMTPS id 496d2b36e9b2.1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384); Fri, 27 Jan 2023 11:41:48 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=HSlpimX2uVn1xq7nvWgwXNkUfk8Z0aXIQxhaU1ANcUn7wlerGMBPMyF2X3CqezsF28ZL6VSfSrNHRE5ARI/kkiXC8VwnI25epJJF5q9x9CVngpocvZ4BZwmoe/5J5eOrFpSNKwslUA+8zsn8Fn55mC2xGk5k9Y5UaOl3qMV/DonvcrgNBNmLMLzCD3MJB9TNl139rSi+G0gnL424Ca6LynKD6SzkNxlpd/getnLpVJeud7ec+K0sZQFjaxB2sBMCuPqI6s3g1SAZN5+9eKZ8Og0XUt9MLMioLfhLpAmdd0vgrBktGRfBWsoy8mwdNAJ5elpalpzS224ZsZ42rOxteA== 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=SFNQAxSU7XAJtJhJFGLeQLPoIFHCEXEJJzjwvGAuSAo=; b=RecQWZn5VyHaYQmJZGmcLEepxfJwIG2T5K3oSZp7H1AqTiMTff83yq5s1IFiL+OdCMXPPx+6dWLfqDsb3R1Et97IIltGrANk/bSNilE59fUZ99rSWfIbZfTBFHb+0BIiAdWtHRqoD4bWfMK1t598K9KAu+AWf/rda0SAD/fpRofIdwRT/Nf/7t0SN9fvtAsL0WwTGr1UgCL4jFIi7U3jz/JDIvwxVZIpHnmd9D/W6HLHlay+CIOmIVvidw7GcWwoI7p4RIl4uEXjv+Teyw2wMxAhIjFhwb0My70lncuUKyq2cJfdNbTV/DHK5roRNWGthbCCHVbI2UTcdXwmz0UZcA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 40.67.248.234) smtp.rcpttodomain=linux.dev smtp.mailfrom=arm.com; dmarc=pass (p=none sp=none pct=100) action=none header.from=arm.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector2-armh-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=SFNQAxSU7XAJtJhJFGLeQLPoIFHCEXEJJzjwvGAuSAo=; b=3KMDKRZwFWb9ItNkbUaQhuGI41XuKkUT4DSbqUMi614rMCTgaTLpG/16qVo9FhAqVB9PWiaMkS2IoI3SkgRMlPVdVQyqiO8MunblxaDgPqKL9scwX6fQPp7N7L9/6bCc/S6T+wHQ3oQyocuLb/a4NW8YzXEALI3bDvXdcWflQPM= Received: from DB6PR0801CA0043.eurprd08.prod.outlook.com (2603:10a6:4:2b::11) by GV1PR08MB7682.eurprd08.prod.outlook.com (2603:10a6:150:61::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6043.23; Fri, 27 Jan 2023 11:41:45 +0000 Received: from DBAEUR03FT030.eop-EUR03.prod.protection.outlook.com (2603:10a6:4:2b:cafe::4b) by DB6PR0801CA0043.outlook.office365.com (2603:10a6:4:2b::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6043.22 via Frontend Transport; Fri, 27 Jan 2023 11:41:45 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 40.67.248.234) smtp.mailfrom=arm.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=arm.com; Received-SPF: Pass (protection.outlook.com: domain of arm.com designates 40.67.248.234 as permitted sender) receiver=protection.outlook.com; client-ip=40.67.248.234; helo=nebula.arm.com; pr=C Received: from nebula.arm.com (40.67.248.234) by DBAEUR03FT030.mail.protection.outlook.com (100.127.142.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6043.23 via Frontend Transport; Fri, 27 Jan 2023 11:41:44 +0000 Received: from AZ-NEU-EX03.Arm.com (10.251.24.31) by AZ-NEU-EX04.Arm.com (10.251.24.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.16; Fri, 27 Jan 2023 11:41:44 +0000 Received: from e124191.cambridge.arm.com (10.1.197.45) by mail.arm.com (10.251.24.31) with Microsoft SMTP Server id 15.1.2507.16 via Frontend Transport; Fri, 27 Jan 2023 11:41:38 +0000 From: Joey Gouly To: Andrew Jones , , CC: , Alexandru Elisei , Christoffer Dall , Fuad Tabba , Jean-Philippe Brucker , Joey Gouly , Marc Zyngier , Mark Rutland , Oliver Upton , Paolo Bonzini , Quentin Perret , Steven Price , Suzuki K Poulose , "Thomas Huth" , Will Deacon , Zenghui Yu , , , , Subject: [RFC kvm-unit-tests 05/27] arm: Introduce NS_SHARED PTE attribute Date: Fri, 27 Jan 2023 11:40:46 +0000 Message-ID: <20230127114108.10025-6-joey.gouly@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230127114108.10025-1-joey.gouly@arm.com> References: <20230127112248.136810-1-suzuki.poulose@arm.com> <20230127114108.10025-1-joey.gouly@arm.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain X-EOPAttributedMessage: 1 X-MS-TrafficTypeDiagnostic: DBAEUR03FT030:EE_|GV1PR08MB7682:EE_|AM7EUR03FT021:EE_|DB3PR08MB8889:EE_ X-MS-Office365-Filtering-Correlation-Id: 1f144fcc-534c-404b-5ecc-08db005b7dd1 x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: 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 X-Forefront-Antispam-Report-Untrusted: CIP:40.67.248.234;CTRY:IE;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:nebula.arm.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230025)(4636009)(376002)(136003)(346002)(396003)(39860400002)(451199018)(40470700004)(46966006)(36840700001)(356005)(2906002)(44832011)(5660300002)(7416002)(81166007)(8936002)(41300700001)(6666004)(86362001)(478600001)(40460700003)(83380400001)(110136005)(36860700001)(54906003)(82740400003)(316002)(82310400005)(47076005)(426003)(336012)(40480700001)(36756003)(2616005)(7696005)(8676002)(70586007)(4326008)(70206006)(1076003)(186003)(26005)(2101003)(36900700001);DIR:OUT;SFP:1101; X-MS-Exchange-Transport-CrossTenantHeadersStamped: GV1PR08MB7682 X-MS-Exchange-Transport-CrossTenantHeadersStripped: AM7EUR03FT021.eop-EUR03.prod.protection.outlook.com X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id-Prvs: 13603eb6-22e3-412e-8705-08db005b776a X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 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:(13230025)(4636009)(346002)(136003)(396003)(39860400002)(376002)(451199018)(40470700004)(46966006)(36840700001)(40480700001)(2906002)(8936002)(82310400005)(336012)(36860700001)(81166007)(6666004)(107886003)(82740400003)(54906003)(70586007)(8676002)(41300700001)(70206006)(40460700003)(110136005)(36756003)(4326008)(478600001)(47076005)(450100002)(5660300002)(316002)(1076003)(186003)(2616005)(83380400001)(7696005)(426003)(26005)(44832011)(86362001)(2101003);DIR:OUT;SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Jan 2023 11:41:55.5173 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1f144fcc-534c-404b-5ecc-08db005b7dd1 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: AM7EUR03FT021.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB3PR08MB8889 Introduce a new attribute to indicate the mapping is "Shared" with the host. This will be used by the Realms to share pages with the Host. For normal VMs, this is always 0. For realms, this is dynamic, depending on the IPA width. The top bit of the IPA is "treated" as the "NS_SHARED" attribute, making the VM access the unprotected alias of the IPA. By default, apply the NS_SHARED attribute for all I/O. Signed-off-by: Joey Gouly --- lib/arm/mmu.c | 5 ++++- lib/arm64/asm/pgtable.h | 6 ++++++ 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/lib/arm/mmu.c b/lib/arm/mmu.c index acaf5614..6f1f42f5 100644 --- a/lib/arm/mmu.c +++ b/lib/arm/mmu.c @@ -22,6 +22,8 @@ pgd_t *mmu_idmap; +/* Used by Realms, depends on IPA size */ +unsigned long prot_ns_shared = 0; unsigned long phys_mask_shift = 48; /* CPU 0 starts with disabled MMU */ @@ -194,7 +196,8 @@ void __iomem *__ioremap(phys_addr_t phys_addr, size_t size) { phys_addr_t paddr_aligned = phys_addr & PAGE_MASK; phys_addr_t paddr_end = PAGE_ALIGN(phys_addr + size); - pgprot_t prot = __pgprot(PTE_UNCACHED | PTE_USER | PTE_UXN | PTE_PXN); + pgprot_t prot = __pgprot(PTE_UNCACHED | PTE_USER | PTE_UXN | + PTE_PXN | PTE_NS_SHARED); pgd_t *pgtable; assert(sizeof(long) == 8 || !(phys_addr >> 32)); diff --git a/lib/arm64/asm/pgtable.h b/lib/arm64/asm/pgtable.h index 22ce64f0..5b9f40b0 100644 --- a/lib/arm64/asm/pgtable.h +++ b/lib/arm64/asm/pgtable.h @@ -22,6 +22,12 @@ #include extern unsigned long prot_ns_shared; +/* + * The Non-secure shared bit for Realms is actually part of the output + * address, however it is modeled as a PTE attribute. +*/ +#define PTE_NS_SHARED (prot_ns_shared) + /* * Highest possible physical address supported. */ -- 2.17.1 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 82FF5C38142 for ; Fri, 27 Jan 2023 12:21:55 +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:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=AZayFl9+B2P5XtjWy0eTHDV0P9RGxHg8hoh/HwFd8dg=; b=uNRNAFtVqCrRoo 2BhUel7hd5aLXbrTcz6B/1yDizllicq1NLg7qkoJX18NknCDh4THMb3OFw/BDzmcrztODn+ze02Ls KeJgZBaR5DFRT9IA33Yrq7fkNUHGG4XiLxR8BxaWBM2/IZXoyi6c0JqMdMT6y+H8HRI8lDj9yCqgA 9WHOWPhKhKmZiMpa4G4AlZ9vXv0J1iA+lODMAfmIiMAY9r5jt/h8Aazek2xl0Q5jhKQY8uaFFiXeu lbCRkKmKQC2UMx9Q6/+Y1QY27CfCEpUowTNtz8A0cRzoo/iSFYO/gdd7ZDme3oY4LV7EooMlLvBZo i1MyEtFxdw502lsTha9w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pLNiO-00EVNR-HK; Fri, 27 Jan 2023 12:20:21 +0000 Received: from mail-he1eur04on2088.outbound.protection.outlook.com ([40.107.7.88] helo=EUR04-HE1-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pLN7J-00EDkV-1c for linux-arm-kernel@lists.infradead.org; Fri, 27 Jan 2023 11:42:02 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector2-armh-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=SFNQAxSU7XAJtJhJFGLeQLPoIFHCEXEJJzjwvGAuSAo=; b=3KMDKRZwFWb9ItNkbUaQhuGI41XuKkUT4DSbqUMi614rMCTgaTLpG/16qVo9FhAqVB9PWiaMkS2IoI3SkgRMlPVdVQyqiO8MunblxaDgPqKL9scwX6fQPp7N7L9/6bCc/S6T+wHQ3oQyocuLb/a4NW8YzXEALI3bDvXdcWflQPM= Received: from AS8PR04CA0087.eurprd04.prod.outlook.com (2603:10a6:20b:313::32) by PA4PR08MB7410.eurprd08.prod.outlook.com (2603:10a6:102:2a2::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6002.33; Fri, 27 Jan 2023 11:41:55 +0000 Received: from AM7EUR03FT060.eop-EUR03.prod.protection.outlook.com (2603:10a6:20b:313:cafe::df) by AS8PR04CA0087.outlook.office365.com (2603:10a6:20b:313::32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6043.23 via Frontend Transport; Fri, 27 Jan 2023 11:41:55 +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=armh.onmicrosoft.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 AM7EUR03FT060.mail.protection.outlook.com (100.127.140.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6043.21 via Frontend Transport; Fri, 27 Jan 2023 11:41:55 +0000 Received: ("Tessian outbound 333ca28169fa:v132"); Fri, 27 Jan 2023 11:41:55 +0000 X-CheckRecipientChecked: true X-CR-MTA-CID: ec865946f5b87296 X-CR-MTA-TID: 64aa7808 Received: from 496d2b36e9b2.1 by 64aa7808-outbound-1.mta.getcheckrecipient.com id A7413008-086D-4EFF-988E-873B3B9F265B.1; Fri, 27 Jan 2023 11:41:48 +0000 Received: from EUR02-VI1-obe.outbound.protection.outlook.com by 64aa7808-outbound-1.mta.getcheckrecipient.com with ESMTPS id 496d2b36e9b2.1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384); Fri, 27 Jan 2023 11:41:48 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=HSlpimX2uVn1xq7nvWgwXNkUfk8Z0aXIQxhaU1ANcUn7wlerGMBPMyF2X3CqezsF28ZL6VSfSrNHRE5ARI/kkiXC8VwnI25epJJF5q9x9CVngpocvZ4BZwmoe/5J5eOrFpSNKwslUA+8zsn8Fn55mC2xGk5k9Y5UaOl3qMV/DonvcrgNBNmLMLzCD3MJB9TNl139rSi+G0gnL424Ca6LynKD6SzkNxlpd/getnLpVJeud7ec+K0sZQFjaxB2sBMCuPqI6s3g1SAZN5+9eKZ8Og0XUt9MLMioLfhLpAmdd0vgrBktGRfBWsoy8mwdNAJ5elpalpzS224ZsZ42rOxteA== 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=SFNQAxSU7XAJtJhJFGLeQLPoIFHCEXEJJzjwvGAuSAo=; b=RecQWZn5VyHaYQmJZGmcLEepxfJwIG2T5K3oSZp7H1AqTiMTff83yq5s1IFiL+OdCMXPPx+6dWLfqDsb3R1Et97IIltGrANk/bSNilE59fUZ99rSWfIbZfTBFHb+0BIiAdWtHRqoD4bWfMK1t598K9KAu+AWf/rda0SAD/fpRofIdwRT/Nf/7t0SN9fvtAsL0WwTGr1UgCL4jFIi7U3jz/JDIvwxVZIpHnmd9D/W6HLHlay+CIOmIVvidw7GcWwoI7p4RIl4uEXjv+Teyw2wMxAhIjFhwb0My70lncuUKyq2cJfdNbTV/DHK5roRNWGthbCCHVbI2UTcdXwmz0UZcA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 40.67.248.234) smtp.rcpttodomain=linux.dev smtp.mailfrom=arm.com; dmarc=pass (p=none sp=none pct=100) action=none header.from=arm.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector2-armh-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=SFNQAxSU7XAJtJhJFGLeQLPoIFHCEXEJJzjwvGAuSAo=; b=3KMDKRZwFWb9ItNkbUaQhuGI41XuKkUT4DSbqUMi614rMCTgaTLpG/16qVo9FhAqVB9PWiaMkS2IoI3SkgRMlPVdVQyqiO8MunblxaDgPqKL9scwX6fQPp7N7L9/6bCc/S6T+wHQ3oQyocuLb/a4NW8YzXEALI3bDvXdcWflQPM= Received: from DB6PR0801CA0043.eurprd08.prod.outlook.com (2603:10a6:4:2b::11) by GV1PR08MB7682.eurprd08.prod.outlook.com (2603:10a6:150:61::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6043.23; Fri, 27 Jan 2023 11:41:45 +0000 Received: from DBAEUR03FT030.eop-EUR03.prod.protection.outlook.com (2603:10a6:4:2b:cafe::4b) by DB6PR0801CA0043.outlook.office365.com (2603:10a6:4:2b::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6043.22 via Frontend Transport; Fri, 27 Jan 2023 11:41:45 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 40.67.248.234) smtp.mailfrom=arm.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=arm.com; Received-SPF: Pass (protection.outlook.com: domain of arm.com designates 40.67.248.234 as permitted sender) receiver=protection.outlook.com; client-ip=40.67.248.234; helo=nebula.arm.com; pr=C Received: from nebula.arm.com (40.67.248.234) by DBAEUR03FT030.mail.protection.outlook.com (100.127.142.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6043.23 via Frontend Transport; Fri, 27 Jan 2023 11:41:44 +0000 Received: from AZ-NEU-EX03.Arm.com (10.251.24.31) by AZ-NEU-EX04.Arm.com (10.251.24.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.16; Fri, 27 Jan 2023 11:41:44 +0000 Received: from e124191.cambridge.arm.com (10.1.197.45) by mail.arm.com (10.251.24.31) with Microsoft SMTP Server id 15.1.2507.16 via Frontend Transport; Fri, 27 Jan 2023 11:41:38 +0000 From: Joey Gouly To: Andrew Jones , , CC: , Alexandru Elisei , Christoffer Dall , Fuad Tabba , Jean-Philippe Brucker , Joey Gouly , Marc Zyngier , Mark Rutland , Oliver Upton , Paolo Bonzini , Quentin Perret , Steven Price , Suzuki K Poulose , "Thomas Huth" , Will Deacon , Zenghui Yu , , , , Subject: [RFC kvm-unit-tests 05/27] arm: Introduce NS_SHARED PTE attribute Date: Fri, 27 Jan 2023 11:40:46 +0000 Message-ID: <20230127114108.10025-6-joey.gouly@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230127114108.10025-1-joey.gouly@arm.com> References: <20230127112248.136810-1-suzuki.poulose@arm.com> <20230127114108.10025-1-joey.gouly@arm.com> MIME-Version: 1.0 X-EOPAttributedMessage: 1 X-MS-TrafficTypeDiagnostic: DBAEUR03FT030:EE_|GV1PR08MB7682:EE_|AM7EUR03FT060:EE_|PA4PR08MB7410:EE_ X-MS-Office365-Filtering-Correlation-Id: e0c3f790-5586-4d7c-a4bc-08db005b7dd0 x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: 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 X-Forefront-Antispam-Report-Untrusted: CIP:40.67.248.234;CTRY:IE;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:nebula.arm.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230025)(4636009)(376002)(136003)(346002)(396003)(39860400002)(451199018)(40470700004)(46966006)(36840700001)(356005)(2906002)(44832011)(5660300002)(7416002)(81166007)(8936002)(41300700001)(6666004)(86362001)(478600001)(40460700003)(83380400001)(110136005)(36860700001)(54906003)(82740400003)(316002)(82310400005)(47076005)(426003)(336012)(40480700001)(36756003)(2616005)(7696005)(8676002)(70586007)(4326008)(70206006)(1076003)(186003)(26005)(2101003)(36900700001);DIR:OUT;SFP:1101; X-MS-Exchange-Transport-CrossTenantHeadersStamped: GV1PR08MB7682 X-MS-Exchange-Transport-CrossTenantHeadersStripped: AM7EUR03FT060.eop-EUR03.prod.protection.outlook.com X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id-Prvs: 13603eb6-22e3-412e-8705-08db005b776a X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 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:(13230025)(4636009)(396003)(376002)(346002)(136003)(39860400002)(451199018)(36840700001)(40470700004)(46966006)(6666004)(8936002)(107886003)(5660300002)(26005)(478600001)(83380400001)(186003)(54906003)(81166007)(2906002)(1076003)(82310400005)(336012)(41300700001)(8676002)(86362001)(82740400003)(2616005)(110136005)(40460700003)(70586007)(4326008)(70206006)(316002)(40480700001)(47076005)(7696005)(44832011)(426003)(36860700001)(36756003)(2101003);DIR:OUT;SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Jan 2023 11:41:55.5281 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e0c3f790-5586-4d7c-a4bc-08db005b7dd0 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: AM7EUR03FT060.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PA4PR08MB7410 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230127_034201_177184_F90B86A6 X-CRM114-Status: GOOD ( 14.04 ) 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 Introduce a new attribute to indicate the mapping is "Shared" with the host. This will be used by the Realms to share pages with the Host. For normal VMs, this is always 0. For realms, this is dynamic, depending on the IPA width. The top bit of the IPA is "treated" as the "NS_SHARED" attribute, making the VM access the unprotected alias of the IPA. By default, apply the NS_SHARED attribute for all I/O. Signed-off-by: Joey Gouly --- lib/arm/mmu.c | 5 ++++- lib/arm64/asm/pgtable.h | 6 ++++++ 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/lib/arm/mmu.c b/lib/arm/mmu.c index acaf5614..6f1f42f5 100644 --- a/lib/arm/mmu.c +++ b/lib/arm/mmu.c @@ -22,6 +22,8 @@ pgd_t *mmu_idmap; +/* Used by Realms, depends on IPA size */ +unsigned long prot_ns_shared = 0; unsigned long phys_mask_shift = 48; /* CPU 0 starts with disabled MMU */ @@ -194,7 +196,8 @@ void __iomem *__ioremap(phys_addr_t phys_addr, size_t size) { phys_addr_t paddr_aligned = phys_addr & PAGE_MASK; phys_addr_t paddr_end = PAGE_ALIGN(phys_addr + size); - pgprot_t prot = __pgprot(PTE_UNCACHED | PTE_USER | PTE_UXN | PTE_PXN); + pgprot_t prot = __pgprot(PTE_UNCACHED | PTE_USER | PTE_UXN | + PTE_PXN | PTE_NS_SHARED); pgd_t *pgtable; assert(sizeof(long) == 8 || !(phys_addr >> 32)); diff --git a/lib/arm64/asm/pgtable.h b/lib/arm64/asm/pgtable.h index 22ce64f0..5b9f40b0 100644 --- a/lib/arm64/asm/pgtable.h +++ b/lib/arm64/asm/pgtable.h @@ -22,6 +22,12 @@ #include extern unsigned long prot_ns_shared; +/* + * The Non-secure shared bit for Realms is actually part of the output + * address, however it is modeled as a PTE attribute. +*/ +#define PTE_NS_SHARED (prot_ns_shared) + /* * Highest possible physical address supported. */ -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel