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 08C3AFF8860 for ; Mon, 27 Apr 2026 16:08:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:MIME-Version: Content-Transfer-Encoding:Content-Type:In-Reply-To:References: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=kRamVWr0nMW8QJkyQzjgwwW9L0y2UjyJklSAi1c+eHM=; b=OrTP7jONyJL2kh4ZKq3rGYGu6c r8eewSqzr+2SvVVeRgtpZ2WNYYB6JSHRFYbsh+nAY0WNpfmL8DUn3KaVpOOHwbiCC3xGstboJ9wv2 w5MdocaMiMSTHDvVGIuln2D79arw3FgzUW/ljWEhp6hK4z9PSLU6ur41u+wkfue9MENUAxFFl+nHH ++7P/9J3HuCOBjSXepUjwO9u1ScDGIU4bEtKxzcBQdC9rv3VZ5hp8k+SeupuVgDO/DN2tNpqBqycT Z3XwAyBdIp1MslLLreCLmReH2b6Ho475F1txGZmPnIs5UMQ39H7ofgpaEJSY5+bj/0thReYi6FAku Js8mMcmg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHOVQ-0000000HHBR-0Lxm; Mon, 27 Apr 2026 16:08:20 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHOVO-0000000HHAJ-3L4a for linux-arm-kernel@bombadil.infradead.org; Mon, 27 Apr 2026 16:08:19 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=MIME-Version:Content-Transfer-Encoding :Content-Type:In-Reply-To:References:Message-ID:Date:Subject:CC:To:From: Sender:Reply-To:Content-ID:Content-Description; bh=kRamVWr0nMW8QJkyQzjgwwW9L0y2UjyJklSAi1c+eHM=; b=CI5X+bRBihMuqlZvnKqEQJnFm5 I48GVHjbpNQUjZq5Dt3zLhBkeAhV0may4PBzvkTgToxHXe7IHDPBOJu9ayuxCObLdBX2B2dmOaiPx Qm8Uq3XcpNYEXbVaDmLpK9xCSPknMYyJ944NvPdUv3sb/povPWuYCxPlWYs/dY9NcVzYrgGfl8VL2 E91IJpsu39DjeE69a7aYsFyEf6y/ppEbCpWuVsIFM89yu5sLDTQ/uwJ+LbRnwPBsIeycHFHqkmAzo Th4wMB95DRDUaRv0l/peEZNXdB+E9hzBp4LSFq4Z7qMeo7ChdXM/7QkK57nU8cgwZ0OJHFHXuuv+l 6LbyGTWQ==; Received: from mail-swedencentralazon11013000.outbound.protection.outlook.com ([52.101.83.0] helo=GVXPR05CU001.outbound.protection.outlook.com) by desiato.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHOVL-000000014jk-17vZ for linux-arm-kernel@lists.infradead.org; Mon, 27 Apr 2026 16:08:17 +0000 ARC-Seal: i=2; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=pass; b=PlMLJm8KX6eF1VQ8ngkZw+8CssxWS0C1OQykphncQoLcxPFQZcjUpix7nmmg9dE0L/AHJkyf20JjAyOjiAVwJAXhJfe8Th/bKmVjow+TWIon714JfghIDZctkBxghR5JJBrsX3uEtNgiNswxl+wABfMNQEilgIeLUzp9dz27X/IqcavyYu74lj+whcATs50Kz7L/oMnS+jvyxPzrruxjt+OtaCKwZeV0TkykDl7zDlDqI1GwJ+MX06ZWPCs3Eror7ogxyeU8GZKVnMCz4jYd51LZLc6QEjXetxoeaZ/8fEKTeaQiqIV5Pn/3TKi5jC3f17+DB7V2YAXfAyVfmY4bMg== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=kRamVWr0nMW8QJkyQzjgwwW9L0y2UjyJklSAi1c+eHM=; b=w0OYu/eur9ApWu2PemqIzuVUck1mxSFah8HTKealUDCBnMoE6/fmZ6L+us4EDbcHyrmuY8XopyqBnF5nz8yCAPcV2ma2lDh4lpe2y+3W/dMg7VVeqe31OH2/pSPaU0HEqCEs7s+u4Pwzg9VcT3KSURNeOR/OCluuXPI/I9OfCBskoggjgJIF2o4k9AnG/hFoBJFtqHp5OLYwqoLVNsovo8NGiqKfX79W/0u4Hq9bkeP0ZzhIknz7MMR29/kZwZkDHmrVCN6kIJN4Oentctz4qJLEYKqsnmN8l5S9v+DpS2aBwJK+/PrDNWsNSavmpeFNV4EzHwBsjJdKGHRuablo0g== ARC-Authentication-Results: i=2; mx.microsoft.com 1; spf=pass (sender ip is 4.158.2.129) 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=kRamVWr0nMW8QJkyQzjgwwW9L0y2UjyJklSAi1c+eHM=; b=cNy3/bm47jvbCo9CfpCpI/MH6Bf7xekdFUaEPAsisJg7M6D5AADiaNAA4AYwSISmFe6YhtOoO+h6pkkA3P7IPZihiZojk4AuqEAiFjOcLHdCLhu/q5kWcKRhNDcvnC7Al94foD/zHzbhhemvEOOypU91O4JufLIn/GJ1AZYg+lg= Received: from DUZPR01CA0336.eurprd01.prod.exchangelabs.com (2603:10a6:10:4b8::21) by AS8PR08MB9017.eurprd08.prod.outlook.com (2603:10a6:20b:5b1::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9846.26; Mon, 27 Apr 2026 16:08:06 +0000 Received: from DB1PEPF000509FA.eurprd03.prod.outlook.com (2603:10a6:10:4b8:cafe::ab) by DUZPR01CA0336.outlook.office365.com (2603:10a6:10:4b8::21) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.9846.26 via Frontend Transport; Mon, 27 Apr 2026 16:08:06 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 4.158.2.129) 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 4.158.2.129 as permitted sender) receiver=protection.outlook.com; client-ip=4.158.2.129; helo=outbound-uk1.az.dlp.m.darktrace.com; pr=C Received: from outbound-uk1.az.dlp.m.darktrace.com (4.158.2.129) by DB1PEPF000509FA.mail.protection.outlook.com (10.167.242.36) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.9846.18 via Frontend Transport; Mon, 27 Apr 2026 16:08:06 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=aiLE/1zr+MzDWtMBlpEzdr1TInGmleVXj+w+LdynyR/+xgmRMcc1lRTf+3aTLHmBy3kgbYZ5fkPRHNH4tLx7vJhr8byLhhnRZJaaYLquoU2fnnE6To2P+wZJRQ25qhas/wcdCSNzyhXYY2J/FC9AJXUTrLwcqEFkcuub++IKx3/pv89mLNrD/4wY9Quz7+irPD7aXMUPM5xlOktf/OwUqD5/UvHhhMjQYbCE8lQBsHdUYITiIaVOQcaimDG59qhkR1S2a/dTNvZfNgbmrn3fsdSRVjIeKic1bqjRuO4cME3fyS/Ddd888ja2zKtGFSez1w08xD7t31DWDIrdAtn8lw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=kRamVWr0nMW8QJkyQzjgwwW9L0y2UjyJklSAi1c+eHM=; b=dv8KWNuRPRHV9f8OSQ2sp0i+4jxngjCSGVG7entKHohbIms5K9v2VOw3f9u0BVY1kwSV6L0BAvMmvQD6yVOsZMzX847FYYzoMvzp3/yVLqoru3hxvxYPruHOhp9jjnsRenviTlas9fyxDbujizOVuxQQ1I8Sa4E6htWYxz/jR188RfNITurkiyqmXpD7n6G1/X3g7Pu1padPwxS4E+yDmGiJHNaLWyW3bzogRqNDTCaV08LvvTyf4PfF/I+O8Ob86BgnZewB6bGtjyEcWQP1PvI2Yz5NcyNgR01+2mevMTREWwPH4uj+VETL/+qzoHiXeFLmkJn0QBOrLM6I6I+7LQ== 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=kRamVWr0nMW8QJkyQzjgwwW9L0y2UjyJklSAi1c+eHM=; b=cNy3/bm47jvbCo9CfpCpI/MH6Bf7xekdFUaEPAsisJg7M6D5AADiaNAA4AYwSISmFe6YhtOoO+h6pkkA3P7IPZihiZojk4AuqEAiFjOcLHdCLhu/q5kWcKRhNDcvnC7Al94foD/zHzbhhemvEOOypU91O4JufLIn/GJ1AZYg+lg= Received: from VI1PR08MB3408.eurprd08.prod.outlook.com (2603:10a6:803:7c::10) by VE1PR08MB5792.eurprd08.prod.outlook.com (2603:10a6:800:1a6::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9769.20; Mon, 27 Apr 2026 16:07:03 +0000 Received: from VI1PR08MB3408.eurprd08.prod.outlook.com ([fe80::6daa:d2f4:acf1:84ba]) by VI1PR08MB3408.eurprd08.prod.outlook.com ([fe80::6daa:d2f4:acf1:84ba%7]) with mapi id 15.20.9846.025; Mon, 27 Apr 2026 16:07:03 +0000 From: Sascha Bischoff To: "linux-arm-kernel@lists.infradead.org" , "kvmarm@lists.linux.dev" , "kvm@vger.kernel.org" CC: nd , "maz@kernel.org" , "oliver.upton@linux.dev" , Joey Gouly , Suzuki Poulose , "yuzenghui@huawei.com" , "peter.maydell@linaro.org" , "lpieralisi@kernel.org" , Timothy Hayes Subject: [PATCH 03/43] KVM: arm64: gic-v5: Add resident/non-resident hyp calls Thread-Topic: [PATCH 03/43] KVM: arm64: gic-v5: Add resident/non-resident hyp calls Thread-Index: AQHc1l/jCx2DBVuBLUy+7GS3HEx/cw== Date: Mon, 27 Apr 2026 16:07:03 +0000 Message-ID: <20260427160547.3129448-4-sascha.bischoff@arm.com> References: <20260427160547.3129448-1-sascha.bischoff@arm.com> In-Reply-To: <20260427160547.3129448-1-sascha.bischoff@arm.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.34.1 Authentication-Results-Original: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=arm.com; x-ms-traffictypediagnostic: VI1PR08MB3408:EE_|VE1PR08MB5792:EE_|DB1PEPF000509FA:EE_|AS8PR08MB9017:EE_ X-MS-Office365-Filtering-Correlation-Id: 9f962fa1-e37b-47ea-fcff-08dea4772b1c x-checkrecipientrouted: true nodisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0;ARA:13230040|1800799024|376014|366016|38070700021|56012099003|18002099003|22082099003|18096099003; X-Microsoft-Antispam-Message-Info-Original: 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 X-Forefront-Antispam-Report-Untrusted: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:VI1PR08MB3408.eurprd08.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(376014)(366016)(38070700021)(56012099003)(18002099003)(22082099003)(18096099003);DIR:OUT;SFP:1101; Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Exchange-RoutingPolicyChecked: L9UmOu8wARAPzwEnc7F0gK2GjdepFrr9m/LDZShi591AMAgPMWUUCMWmvFXihrSaWfAjUWXP+e8T15ze5f1PpwJWrm34STcQKGRUHcVxRv+2ws0tzvy4EpRZwiqRY2bHnwDEMGD5/yYhOSBZW8ut8McFkUfpHvQg8GoWa7KmFpxiQgc/rY4XKiv0HwaoqNNuTZhumPE1ox8+CoVyQ5AWbPcM4MPo7QmFuwVkoRYBk/5D5qef7YU0OKeX7zFr6KpnigOfNYsUxMrtXgn6/bteJhDqEvY97Jlkx0a9oBFdUw0sIfZtN6r7jlbwj/YrG/GjbnkP53DEOWC+T+A0s+8+Cg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VE1PR08MB5792 X-EOPAttributedMessage: 0 X-MS-Exchange-Transport-CrossTenantHeadersStripped: DB1PEPF000509FA.eurprd03.prod.outlook.com X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id-Prvs: e3a17124-ffad-4738-865a-08dea47705ae X-Microsoft-Antispam: BCL:0;ARA:13230040|14060799003|1800799024|35042699022|82310400026|376014|36860700016|56012099003|18096099003|22082099003|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:4.158.2.129;CTRY:GB;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:outbound-uk1.az.dlp.m.darktrace.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(14060799003)(1800799024)(35042699022)(82310400026)(376014)(36860700016)(56012099003)(18096099003)(22082099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: FRHFqexzMfeidPtj3wZBggPHdhQma+9zQOSmgeuOG9r4SLJ9rJs2yvCYQc58kx8LmRjMUvtIOyM6MAXw6I11RXI8TtJEfXMYVvcfMQhTDGmt86B84aoyWiyhQCmEUagUbWBc9pC/qK2IcrAOuJ/XpQc//KTcVGvYkM32laosEtcEpmxK1OgmgkspcWC4MxtnUm53nTceyZyX/ti7kJexjG2AmJ8jtdnnC7/idtSQw4vqtuMAlrwbQK2Y0f/NidHJEJtgU5sjCBLhmoqscPP0nmUvJqA8z4/SkbTs/ZFiuU4+zh76K0MNT4aEPC0Frpvr1YnR4BZCFvGQ3/fMn9/odvqRJ26UPfmNRjfz37/A7XIlcpRnvx2jjgrhXBuXlVq9a5gcfnsDZCbA2JWLKhcz/Hxq0MXKcpk9zKCGlzWJkNW9nwP3kRuU7Xv7/4dG1jSg X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Apr 2026 16:08:06.3356 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9f962fa1-e37b-47ea-fcff-08dea4772b1c X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[4.158.2.129];Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: DB1PEPF000509FA.eurprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR08MB9017 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260427_170815_444567_18012681 X-CRM114-Status: GOOD ( 14.07 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org So far the KVM GICv5 support has been limited to PPIs. These only go as far out as the CPU interface, and have no interaction with the host's IRS. Therefore, PPIs can be directly used for guests without host IRS involvement. However, in order to support both SPIs and LPIs IRS involvement is required. GICv5 introduces the concept of VPE residency - a VPE can be either resident or non-resident. When the VPE is resident, the IRS is allowed to select interrupts that target that VPE (or the VM) as the HPPI (Highest Priority Pending Interrupt). As the IRS handles both SPIs and LPIs, these will only be picked as the IRS's HPPI when a VPE is resident. A GICv5 VPE is made resident by writing to the ICH_CONTEXTR_EL2 with a valid VM and VPE ID, and marking it valid in the process. This informs the IRS that a specific VPE is running, and that it can begin HPPI selection for that VPE. Making a VPE non-resident (by making the ICH_CONTEXTR_EL2 invalid) informs the IRS that the VPE is no longer running, and it stops HPPI selection for it. This change introduces two new hyp calls - one to make a VPE resident and its counterpart to make a VPE non-resident. As part of making a VPE resident, the ICH_CONTEXTR_EL2.F bit is checked in order to catch faults, at which point the kernel will WARN. If everything is configured correctly, this should not happen. Signed-off-by: Sascha Bischoff --- arch/arm64/include/asm/kvm_asm.h | 2 ++ arch/arm64/include/asm/kvm_hyp.h | 2 ++ arch/arm64/kvm/hyp/nvhe/hyp-main.c | 15 +++++++++++++++ arch/arm64/kvm/hyp/vgic-v5-sr.c | 25 +++++++++++++++++++++++++ include/kvm/arm_vgic.h | 3 +++ 5 files changed, 47 insertions(+) diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_= asm.h index fa033be6141ad..8c69f1f4de534 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -79,6 +79,8 @@ enum __kvm_host_smccc_func { __KVM_HOST_SMCCC_FUNC___kvm_timer_set_cntvoff, __KVM_HOST_SMCCC_FUNC___vgic_v3_save_aprs, __KVM_HOST_SMCCC_FUNC___vgic_v3_restore_vmcr_aprs, + __KVM_HOST_SMCCC_FUNC___vgic_v5_make_resident, + __KVM_HOST_SMCCC_FUNC___vgic_v5_make_non_resident, __KVM_HOST_SMCCC_FUNC___vgic_v5_save_apr, __KVM_HOST_SMCCC_FUNC___vgic_v5_restore_vmcr_apr, =20 diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_= hyp.h index 8d06b62e7188c..5f9184276b04e 100644 --- a/arch/arm64/include/asm/kvm_hyp.h +++ b/arch/arm64/include/asm/kvm_hyp.h @@ -88,6 +88,8 @@ void __vgic_v3_restore_vmcr_aprs(struct vgic_v3_cpu_if *c= pu_if); int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu); =20 /* GICv5 */ +void __vgic_v5_make_resident(struct vgic_v5_cpu_if *cpu_if); +void __vgic_v5_make_non_resident(struct vgic_v5_cpu_if *cpu_if); void __vgic_v5_save_apr(struct vgic_v5_cpu_if *cpu_if); void __vgic_v5_restore_vmcr_apr(struct vgic_v5_cpu_if *cpu_if); /* No hypercalls for the following */ diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-main.c b/arch/arm64/kvm/hyp/nvhe/h= yp-main.c index 9e44c05cf780e..804a9ffdc8594 100644 --- a/arch/arm64/kvm/hyp/nvhe/hyp-main.c +++ b/arch/arm64/kvm/hyp/nvhe/hyp-main.c @@ -672,6 +672,19 @@ static void handle___tracing_write_event(struct kvm_cp= u_context *host_ctxt) trace_selftest(id); } =20 +static void handle___vgic_v5_make_resident(struct kvm_cpu_context *host_ct= xt) +{ + DECLARE_REG(struct vgic_v5_cpu_if *, cpu_if, host_ctxt, 1); + + __vgic_v5_make_resident(kern_hyp_va(cpu_if)); +} +static void handle___vgic_v5_make_non_resident(struct kvm_cpu_context *hos= t_ctxt) +{ + DECLARE_REG(struct vgic_v5_cpu_if *, cpu_if, host_ctxt, 1); + + __vgic_v5_make_non_resident(kern_hyp_va(cpu_if)); +} + static void handle___vgic_v5_save_apr(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(struct vgic_v5_cpu_if *, cpu_if, host_ctxt, 1); @@ -711,6 +724,8 @@ static const hcall_t host_hcall[] =3D { HANDLE_FUNC(__kvm_timer_set_cntvoff), HANDLE_FUNC(__vgic_v3_save_aprs), HANDLE_FUNC(__vgic_v3_restore_vmcr_aprs), + HANDLE_FUNC(__vgic_v5_make_resident), + HANDLE_FUNC(__vgic_v5_make_non_resident), HANDLE_FUNC(__vgic_v5_save_apr), HANDLE_FUNC(__vgic_v5_restore_vmcr_apr), =20 diff --git a/arch/arm64/kvm/hyp/vgic-v5-sr.c b/arch/arm64/kvm/hyp/vgic-v5-s= r.c index 6d69dfe89a96c..04c5846b9abac 100644 --- a/arch/arm64/kvm/hyp/vgic-v5-sr.c +++ b/arch/arm64/kvm/hyp/vgic-v5-sr.c @@ -7,6 +7,31 @@ =20 #include =20 +void __vgic_v5_make_resident(struct vgic_v5_cpu_if *cpu_if) +{ + write_sysreg_s(cpu_if->vgic_contextr, SYS_ICH_CONTEXTR_EL2); + isb(); + + /* Catch any faults */ + cpu_if->vgic_contextr =3D read_sysreg_s(SYS_ICH_CONTEXTR_EL2); + if (WARN_ON(FIELD_GET(ICH_CONTEXTR_EL2_F, cpu_if->vgic_contextr))) + return; + + cpu_if->gicv5_vpe.resident =3D true; +} + +void __vgic_v5_make_non_resident(struct vgic_v5_cpu_if *cpu_if) +{ + /* + * Make as non-resident before actually making non-resident. Avoids race + * with doorbell arriving. + */ + cpu_if->gicv5_vpe.resident =3D false; + + write_sysreg_s(cpu_if->vgic_contextr, SYS_ICH_CONTEXTR_EL2); + isb(); +} + void __vgic_v5_save_apr(struct vgic_v5_cpu_if *cpu_if) { cpu_if->vgic_apr =3D read_sysreg_s(SYS_ICH_APR_EL2); diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index fe49fb56dc3c9..d14cf4771d606 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -495,6 +495,9 @@ struct vgic_v5_cpu_if { */ u64 vgic_icsr; =20 + /* The contextr used to make VPEs resident and non-resident */ + u64 vgic_contextr; + struct gicv5_vpe gicv5_vpe; }; =20 --=20 2.34.1