From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E1D6A606A326 for ; Fri, 6 Nov 2026 19:57:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=t7j+hfJO; dkim=pass (2048-bit key, unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256 header.s=selector2 header.b=R4jv5pRl 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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:CC:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=U35EW0rSQqovkhDvCT99KqBJ/0CFSW02gIsNnYH55/I=; b=t7j+hfJO8THXafXC3kIDfrK1SZ ofzDGiMTAB0exWjKl7Nm+VAi2YjiEUBOZ9NzsAcKGmJhd+JXgm5hTCaiJZeAAZhbOBkajSJeiqLGB 6+9C1X5am8Tw2pW64ZkBgYHI3wuFgp3qrkaCoAaKDQJT/uOqFM3PV4EFDmwdWJElw4/k8zpa4OdWp 3nVT2dZzgqmBslJ6YsAV7bqgCuMl8XQ0fOgdRmONDbInuuJX4OFIjH9Cy1PsTZbR05U4Gq7nwYXdY sFq8g61+uUABna1cwv6zzWv1k1CvbJqziw4Yha6LWEcikO8xUUDMVfRRakIQi+V1iK9b3yk3RMSWt uYDPlDwA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xPQ3g-0000000DYsm-35lA; Fri, 06 Nov 2026 19:57:08 +0000 Received: from mail-westus3azlp170100009.outbound.protection.outlook.com ([2a01:111:f403:c107::9] helo=PH7PR06CU001.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xPQ3d-0000000DYsQ-1sRW for linux-arm-kernel@lists.infradead.org; Fri, 06 Nov 2026 19:57:06 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=ikXVkU4pelTiyCuvVzIon9Zc+dasTt/tzaOAaNTchA2P2gXCPTYPUbZC8pga/eHv+DJ5gHVt3dmzdqKAFGl8fqlGlTR6qJvYsmg07sBtAd6TGQCsQRE4ijKVeXEshiqytUbosghCE1hMe819HeEfCnlYU4BnR2Hzx3mc3eScWBpOPMZi74jDYDQJi3gXHaHBAJjF0kcmIZ1Y8QpUaDc9t8neR6JjMRfw/vuUOZGnwDn57SjfCQft/CoTeg6in4Vrey5yq02ONSp12MzKlHmu4/kp3Of6l+lUbpsX1DV1Z7t01Worhwba97hpGmECtD7BnCOLiBrF0s118jGbcc3MVA== 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=U35EW0rSQqovkhDvCT99KqBJ/0CFSW02gIsNnYH55/I=; b=C0WugisHQj/FsEnZX/1N3Om0ookOy+enKELzIcHeJ/99PlMyxVc09ewJ3C5F6+rx5V0nrQPXQ7i4XTclT0e4PdMoQqe+0ozoyZfHYsz+TUHQ+xQWSZSI6ylF4KeGvYm+AzGBZ6Tw/laHD86u8LATdJEcnYN9I0tSrW71nZYg5FTNpZqPSHnjLVkiyzimy7YYQR/XenogbKTlHrBqZYMJ0GsTFTDnSaYmx+uaXVZtdKGpe2i3n4iD4U/BS+2Qmh8P6HxWmH3D2ZIplud+ymjhqZX5ktqFrYIl9Og4mK+dpDSlPC+FV3ZnePLexbGguwZ6ilokq2IWtrIFvIgzl/Bo2A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.118.232) smtp.rcpttodomain=google.com smtp.mailfrom=nvidia.com; dmarc=pass (p=reject sp=reject pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=U35EW0rSQqovkhDvCT99KqBJ/0CFSW02gIsNnYH55/I=; b=R4jv5pRl7/XB6Vpmi9P0w0YtQvjukTnpIk3bkJfEgSrhBayPzmSFZ9XD84HIeEic0KmSJ8ihAMkgQpBcjmJchnKztdYDwuAKnfDzftJSLRE9IzhsRyVO8XBaBdCPrhcbymqarjK/Ei3fjD5wh6eW9Sv0UJuRN7kJOrTwWJoOWEnm2UnSoGJHYcst7MvrTEAJQP+R44pn4Otk5EnIpwdqiVzLNJcCPEgIna7ZbnMLuz7hgT+Ct09pHHXvB29msX7a/zJZubPgLoezObnxYZ6gn0CDMsOKzKO1/orPc7YhabiKuRJLDxhTR7snwh/F3d/+2mmws4C5HlSsJozzxpCblA== Received: from MN0PR04CA0010.namprd04.prod.outlook.com (2603:10b6:208:52d::25) by LV3PR12MB9329.namprd12.prod.outlook.com (2603:10b6:408:21c::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.592.10; Fri, 6 Nov 2026 19:56:59 +0000 Received: from BN7PEPF000000A4.namprd05.prod.outlook.com (2603:10b6:208:52d:cafe::2b) by MN0PR04CA0010.outlook.office365.com (2603:10b6:208:52d::25) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.21.592.11 via Frontend Transport; Fri, 6 Nov 2026 19:56:59 +0000 X-MS-Exchange-Authentication-Results: mx.microsoft.com 1; spf=pass (sender IP is 216.228.118.232) smtp.mailfrom=nvidia.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.118.232 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.118.232; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.118.232) by BN7PEPF000000A4.mail.protection.outlook.com (10.167.245.228) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.615.4 via Frontend Transport; Fri, 6 Nov 2026 19:56:59 +0000 Received: from drhqmail203.nvidia.com (10.126.190.182) by mail.nvidia.com (10.127.129.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.56; Fri, 6 Nov 2026 11:56:40 -0800 Received: from drhqmail203.nvidia.com (10.126.190.182) by drhqmail203.nvidia.com (10.126.190.182) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.56; Fri, 6 Nov 2026 11:56:40 -0800 Received: from nvidia.com (10.127.8.13) by mail.nvidia.com (10.126.190.182) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.56 via Frontend Transport; Fri, 6 Nov 2026 11:56:36 -0800 Date: Fri, 6 Nov 2026 11:56:34 -0800 From: Nicolin Chen To: Mostafa Saleh CC: , , , , , , , , , , , , , , , , Subject: Re: [PATCH v9 13/25] iommu/arm-smmu-v3-kvm: Add MMIO emulation Message-ID: References: <20261015200903.2735565-1-smostafa@google.com> <20261015200903.2735565-14-smostafa@google.com> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20261015200903.2735565-14-smostafa@google.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN7PEPF000000A4:EE_|LV3PR12MB9329:EE_ X-MS-Office365-Filtering-Correlation-Id: 88b9b6ab-1ac1-4e33-2489-08df3c401e57 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|23010399003|1800799024|376014|7416014|82310400026|36860700016|11063799006|4143699003|56012099006|261021135927099003|10067099003|18002099003|22082099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230040)(23010399003)(1800799024)(376014)(7416014)(82310400026)(36860700016)(11063799006)(4143699003)(56012099006)(261021135927099003)(10067099003)(18002099003)(22082099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: KNa9lc+h20sWwkDhVsfyLKMPR+JMOzkw8tmiaFELwOEls32zM1uVneXgn9DNctdkHYp9f+xzY/JqO4tua2CiuNZzbHSFUzkqMt3HthGrOz1uSI0rD0qalTyX3/LxBv77Jm5ZqdC7q9cIWTfJCFHkfqRlCbpSTeZrUjliL5t3RNB9vStnz7WGWKd5LuKgs/bBhs5dUWzJ0nUmdU907cBSHKy/4wGTQZ4NWicSUL1s02D5gUs2JlSTMjMjWmm/Ut28KvZKkjDvAXJIfOZAMVqhulHFaf1RaVDBQpdda3bj3ZkeRx+bF0pjapgTSY19jXQwp/Z9bSXeQqynGeUFBpvMns8l9mFFdq9kbWnGHFwZVCqYDc40IjekQpFoPGBVxQjYIW3KI14FRcCuFGi6+5P/vBNxTqIT9tGt7QtEZXrZwimyhJYE5Hiq2FJeluAAVIKn X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Nov 2026 19:56:59.2655 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 88b9b6ab-1ac1-4e33-2489-08df3c401e57 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN7PEPF000000A4.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV3PR12MB9329 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261106_115705_637978_3219AB70 X-CRM114-Status: UNSURE ( 9.43 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.1 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-5.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Thu, Oct 15, 2026 at 08:08:44PM +0000, Mostafa Saleh wrote: > +static bool smmu_dabt_handler(struct user_pt_regs *regs, u64 esr, u64 addr) > +{ > + struct hyp_arm_smmu_v3_device *smmu; > + bool ret; > + > + for_each_smmu(smmu) { > + if (addr < smmu->mmio_addr || addr >= smmu->mmio_addr + smmu->mmio_size) > + continue; > + hyp_spin_lock(&smmu->lock); > + ret = smmu_dabt_device(smmu, regs, esr, addr - smmu->mmio_addr); Going through the followup patches, I found this smmu_dabt_device gets really too big. Perhaps it can be bisect to read and write at least? Something like: static bool smmu_mmio_handler(smmu, regs, esr, off) { /* decode ESR: len, rd, xzr; width check */ if (is_write) return smmu_mmio_write_handler(smmu, off, len, val); val = smmu_mmio_read_handler(smmu, off, len); if (!is_xzr) regs->regs[rd] = val; return true; } Nicolin