From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=pass header.oldest-pass=0 smtp.remote-ip=52.101.53.47 ARC-Seal: i=2; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=pass; t=1792514991; b=2xr4S1iNw4rRrHBCm1HRR5ugfPj3/eqACIC1Kyv5Y1P1G2zL1jc0pdAVqH1ZBrlSc54y KcX8Lnueas4sa/4P/O2hV3zMPqcpbiShaY1hBwAlO4G1KccCWnq1dtNq9Ez0pG4pWu3Zm wDJC36RUTQw9U9YCskZ0nuuXxq5JAjdu5SmjuiafoMqayb+2/4liAWdCPypJgYz8qUaLF T5Tts8NyfbXWSvb6pHOmJpVG4WO8qGd9sl1/PjIs51i4EgnEIdELMAiN19KesYt+BNe9O vSGgx7Wmg14MU397EVxaaapbMT00PFPQRwQLl69uXbls6Rw/4REBV9Prhh9zY2Bp17Q== ARC-Message-Signature: i=2; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792514991; h=DMARC-Filter:DKIM-Signature:Received:Received: X-MS-Exchange-Authentication-Results:Received-SPF:Received:Received: Received:Received:Date:From:To:CC:Subject:Message-ID:References: MIME-Version:Content-Type:Content-Disposition: Content-Transfer-Encoding:In-Reply-To:X-NV-OnPremToCloud: X-EOPAttributedMessage:X-MS-PublicTrafficType: X-MS-TrafficTypeDiagnostic:X-MS-Office365-Filtering-Correlation-Id: X-MS-Exchange-SenderADCheck:X-MS-Exchange-AntiSpam-Relay: X-Microsoft-Antispam:X-Microsoft-Antispam-Message-Info: X-Forefront-Antispam-Report: X-MS-Exchange-AntiSpam-MessageData-ChunkCount: X-MS-Exchange-AntiSpam-MessageData-0:X-OriginatorOrg: X-MS-Exchange-CrossTenant-OriginalArrivalTime: X-MS-Exchange-CrossTenant-Network-Message-Id: X-MS-Exchange-CrossTenant-Id: X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: X-MS-Exchange-CrossTenant-AuthSource:X-MS-Exchange-CrossTenant-AuthAs: X-MS-Exchange-CrossTenant-FromEntityHeader: X-MS-Exchange-Transport-CrossTenantHeadersStamped; bh=3TEqumpFgdz+Eh/7mNnSZRkNd/JC86au+svrPRCsCsA=; b=EG0+Fh/7XqMLOebJbfLqjxDPfTETPwMu23vtEkdmccM/7Odm5ap6QWRIazap5tq/NzCp B9rBTvKd1VGla9CW3eC/eSom41Xu2tNFGfjm4EOA75++b5y9Jo0E+RcNmGh2ZnoFqp7vb SqHOyHmsKS3OwRHCXE/cbuDbGcpMvIVNK/3piOktZzWbUuU5s7nVR2xeBwXACAecAuLV7 4Lu/Rdn7kgqBpOgEk7GpqpOixR2rhzkPaaf3FfmEZbdLWt1EG+1ebxDLhmvoGL+WBLn6E JwkMA3QMT3SWnhgeYeD0xN9qVAMVbRt/3hU344vzgFuMWQ/pEjKd+mGA+12wFTfGrNw== ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass header.from=nvidia.com; spf=fail smtp.mailfrom=nvidia.com; dkim=pass header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256 header.s=selector2 header.b="C+/Hw3I7"; arc=pass header.oldest-pass=0 smtp.remote-ip=52.101.53.47 Received: from BL0PR03CU003.outbound.protection.outlook.com (mail-eastusazon11012047.outbound.protection.outlook.com [52.101.53.47]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (secp384r1) server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 197BD606A322 for ; Tue, 20 Oct 2026 16:49:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 197BD606A322 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=nvidia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256 header.s=selector2 header.b=C+/Hw3I7 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=q4gSxtHRL945aBnYja4BYNBfIBHXr1z9ymkhjhn0kCUrU6w2HtnCdPldUqQHt1dDQNUWQ6JLAu0fk3mqfAeuhqnR1i35Inmg/MjQgSR703jD8Oi3XQIE9rLEYKX49btNX9gikueqYjFbtljHexGKFD6KJT5xXT/1tfJXqSI0cLbItCbEEQf6+9/n66D/eLNdS06VNLQEn6iTL4sidpeFAWmlZ2agwcaE1PjjFvMe7td+yXFUXIKwKo2GFr7RCtS8TKannAM6oJhoNTkr9cyN+S+CsOnRdcyqjt8HjhX0Xd+pKvntO0/Yev03+A9CkQauwD6W9iXaq2GjZi687shNnw== 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=3TEqumpFgdz+Eh/7mNnSZRkNd/JC86au+svrPRCsCsA=; b=EPffdbwFFPeaQqORe5jFlx3hC4voCWeOPUFynb+5nYe7DGjOlY32ch+2QKxiSAqVUr6v9jVJnCEECKudVWipvK2AwJ+6Vq2CgsxllxZtzzQ5eo8jGn/NOvpIreN2ThCYLY1aDFwOg0J0q3E360vcHd2dxKuzOGA0Q/tPBKR+EHKsep3ghgbsYKMXxG18/h/AhbrCtZ7TA85y+YMijJRek1mARehgrZ0EAblXxKc7It07QSWPuTY3Bv9ZHTA+0UyrTT5AZXOeGrUmhuqvBmrPrsOewHhEq/jW/MVi1UpUhbuJziceCwCUjUMgVYGMCBFWL4vaIp9u9ltneTEBX/Ul9A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.118.233) 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=3TEqumpFgdz+Eh/7mNnSZRkNd/JC86au+svrPRCsCsA=; b=C+/Hw3I7d5G6vjBhW5GMQhC4Z41ZBR3RJ9XyZHA84pa9k9XeLKZSMQU75rT+Xs38a73K5OvHGIP6ib4tssHMcqKdO5JehYktx5ea+QA9OPHTMLeEtIvDyPChrhJ25XTabP359ERq09vQBHD3HldCg08bCt3AYTuD2gc6rYPLhJocztXDl/5ThjYY1620Ii5v6Jt7dQ9sgAtFVYNR8wWUY9AcO85UJnM/GGQ2eGwjEm2qXwcqkt6WvNedQ8xxqUFN5npzX+WRvxkW6gFu8KOtwjkds4Woic+SUg08AuQAXqeTXigfnNYSCpnMkJll0BL6y05ewkiac4ZNMwNgJBQZqQ== Received: from DS7P221CA0017.NAMP221.PROD.OUTLOOK.COM (2603:10b6:8:25c::7) by DS0PR12MB6560.namprd12.prod.outlook.com (2603:10b6:8:d0::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.522.18; Tue, 20 Oct 2026 16:49:42 +0000 Received: from DM3PEPF000265BD.namprd04.prod.outlook.com (2603:10b6:8:25c:cafe::89) by DS7P221CA0017.outlook.office365.com (2603:10b6:8:25c::7) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.21.522.20 via Frontend Transport; Tue, 20 Oct 2026 16:49:42 +0000 X-MS-Exchange-Authentication-Results: mx.microsoft.com 1; spf=pass (sender IP is 216.228.118.233) 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 216.228.118.233 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.118.233; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.118.233) by DM3PEPF000265BD.mail.protection.outlook.com (10.167.23.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.546.15 via Frontend Transport; Tue, 20 Oct 2026 16:49:42 +0000 Received: from drhqmail203.nvidia.com (10.126.190.182) by mail.nvidia.com (10.127.129.6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.56; Tue, 20 Oct 2026 09:49:29 -0700 Received: from drhqmail201.nvidia.com (10.126.190.180) 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 15.2.2562.49; Tue, 20 Oct 2026 09:49:28 -0700 Received: from nvidia.com (10.127.8.13) by mail.nvidia.com (10.126.190.180) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.56 via Frontend Transport; Tue, 20 Oct 2026 09:49:27 -0700 Date: Tue, 20 Oct 2026 09:49:25 -0700 From: Nicolin Chen To: Mostafa Saleh CC: , , , , , , , , , , , Cristian Prundeanu , Breno Leitao Subject: Re: [PATCH v11 04/11] iommu/arm-smmu-v3: Add ARM_SMMU_FEAT_EVTQ for the event queue Message-ID: References: <250a57bbdd232bbb1e3511b7768a1c9ae3d204e6.1791226953.git.nicolinc@nvidia.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM3PEPF000265BD:EE_|DS0PR12MB6560:EE_ X-MS-Office365-Filtering-Correlation-Id: 603f99af-1a52-4c4f-2e4d-08df2eca235f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|1800799024|7416014|376014|23010399003|82310400026|56012099006|4143699003|11063799006|261009223027099003|10067099003|18002099003|22082099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230040)(36860700016)(1800799024)(7416014)(376014)(23010399003)(82310400026)(56012099006)(4143699003)(11063799006)(261009223027099003)(10067099003)(18002099003)(22082099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: aJ2WhnSAdtVr/hqhpCymd03KN21NWpkB+0cYj2aTnSI4zO7X13DAeka/EEhfqvtXSleovpcn7eWYMUIItDL/f4fUPgyLXorpkwjuOtBAxZl4e5xiRDGgNnjqHHPr7JAxVrcX319QqK0WqRKrjcHb8oL7g5peXQ9MlN9vLGu+11Og6SXSTCMB5PVKdQ9j9MTY4y745sq1Ob2r38/wunNC+VbFBOh05sxib9l7RU5GMjnAIt910T6c/SWyE9xg0MzbyaAYrOzBb3GCUPG95szKSxelwvVRPhwqQgt9UAd5ST+jf8COUQUakCSuZei5GuuO2zE2QFy5KnzPia+xDNncmEUtO+11VJ+AeGYqocHPlQEtdZQiGp2+4ndBLXlyc/jYk7/RC/ICg9a2Mx6TLGy1smRluxNZP1X2m+92tx4WgsKEGToGZL+P8/foBDCcKctL X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Oct 2026 16:49:42.0224 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 603f99af-1a52-4c4f-2e4d-08df2eca235f X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM3PEPF000265BD.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB6560 On Tue, Oct 20, 2026 at 11:16:54AM +0000, Mostafa Saleh wrote: > On Mon, Oct 05, 2026 at 12:30:47PM -0700, Nicolin Chen wrote: > > @@ -4950,7 +4959,15 @@ static void arm_smmu_setup_msis(struct arm_smmu_device *smmu) > > > > /* Clear the MSI address regs */ > > writeq_relaxed(0, smmu->base + ARM_SMMU_GERROR_IRQ_CFG0); > > - writeq_relaxed(0, smmu->base + ARM_SMMU_EVTQ_IRQ_CFG0); > > + > > + /* PRIQ's vector needs EVTQ's to be kept */ > > + WARN_ON_ONCE(!(smmu->features & ARM_SMMU_FEAT_EVTQ) && > > + (smmu->features & ARM_SMMU_FEAT_PRI)); > > + > > I can't see how we can end up in this case, I’d suggest dropping it > if I am not missing something. This will be gone, as the prior patch is reworked following Jason's suggestion. Thanks Nicolin