From nobody Tue Dec 2 00:06:09 2025 Received: from CH5PR02CU005.outbound.protection.outlook.com (mail-northcentralusazon11012070.outbound.protection.outlook.com [40.107.200.70]) (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 9BB9C31690E; Wed, 26 Nov 2025 05:26:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.200.70 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764134808; cv=fail; b=Coq1eV25CO5Ua2CExUvpAjajyX5xWm5pR5Zib5p0RSawi+dK+CiJch9AYyWr9SYaCEsljs23+xFoi79Olx+GyFRwfKj3sYfxZaFrdZbCuOCxltCAeepFj/IKU4U+tGGnoHdAWC0l1Ilq9jmf5q+YVuN5hSpkMAurstre7FaZWnA= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764134808; c=relaxed/simple; bh=un7F5tqJ9y+GixGbNE+XnaPeFGQuuCMG8Jn76uuHSyg=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=KXucV+NOcxanzgluRjQAHiFxW/bRjkILkfSKrUB6/e/UYf2y+X5DQm9CqBwdExJdsIaqlV+Ay2q/OmjVONkjXzN+V5ApWJ0JqXLqtl1kR6tSuJjgTeD90qUY+3pgL8Q+fW8B81EXoYUrHWYexzviq44M/u5XTYuhonzcsldU9m0= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com; spf=fail smtp.mailfrom=nvidia.com; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b=jeRa/acd; arc=fail smtp.client-ip=40.107.200.70 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) header.d=Nvidia.com header.i=@Nvidia.com header.b="jeRa/acd" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=knDMqxMXNVwIYIZjKPvbJdZSczfTg37i12bH1ZfxanSOj6GYoqa0u6/cEXoMua15vzG1AAXB1O8Xl8P2sOqwLYw56GdKNPEI4zL6atekSH0hNrz1UhfyRxoUm0RbmnhxIsuNC/T5w8BGSA9XfuFd50M8hfYuvaiLxJ6DwwcDE4zlZKQDzArhRS7QMVf+oyNk/qUF2vg5z599dzehABVd6tVRBmpD707UR+bPPlkTfxc7yEZ0AXcirIw8pabU/2KBx66rA9N7EkKGvKLElthy4zIofiZSDh8RKEvr+r7inbYN3Uamli97XQKdWtJdMJdwQkQl94ojdJX9NtIsLnI5ww== 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=e34IgOv5EC8e8+si/b+QVFRQs/uJawYIjvvOOpHLfE4=; b=T7QkaT+gODhV9+PNZXt9nmcbATpWoi/v2Jj5+i2x9RpWp2DG7SKQcU+4yKBvRy0QvHMGLNaqNeyB9z0T4VaXd01m4te8jENeKnZeC0Uhv/hgaicRALJenJrACNhf+Z1GU2Lmrf7FGA/uucXv+HQo0c7312zrnzqF4k1NG8Hh65cw88aIO42jJVRDtXh2oWd3Y0Bk5U5zuN1j4Ov6JROqc0gOu2SgxZkVc8bHQnlmO15WaI8hADAYei1ERdePR/3wJzs1Drl/vKWdxwVdklXCuU+IE/XlAJk5lJN07ZkN4t8XaudallkESHEOmltIJUVEOMWRI5sttF8CfDxakxx0fA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.118.232) smtp.rcpttodomain=vger.kernel.org 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=e34IgOv5EC8e8+si/b+QVFRQs/uJawYIjvvOOpHLfE4=; b=jeRa/acdImCjpW7JRT5vBuNH1hPNPnJQWbuugu2ZRsEXqLPbUiSIaU7dYzhwe0RZQtcvJ8zEBoJu3w98l++vdF59BugSU7YvGJVfsNDNry09YsP6YgOOLyxr5SgPz7m2GqSUZ0TCbstR2I4L6nzz2cVHowUtlQQFqd7VEqWiGnwugY6k0AcfIadH3bowIkYGMCEB6YCDYI7TbNp0XQ2eLBx4kLMPcs2qsKz+hK7eDps9xk4Gv19sfG+CHamnx8aGdVyxHyjng7Owv2vKyLYsmcepC2z72t0aA6Cng0IXmJVLfNByYGyRwL2iEi0twX6ttBXZuPetH/85sqsrhgZ/iw== Received: from SJ0PR13CA0054.namprd13.prod.outlook.com (2603:10b6:a03:2c2::29) by BL3PR12MB6644.namprd12.prod.outlook.com (2603:10b6:208:3b1::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9366.12; Wed, 26 Nov 2025 05:26:40 +0000 Received: from BY1PEPF0001AE17.namprd04.prod.outlook.com (2603:10b6:a03:2c2:cafe::1d) by SJ0PR13CA0054.outlook.office365.com (2603:10b6:a03:2c2::29) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.9366.11 via Frontend Transport; Wed, 26 Nov 2025 05:26:41 +0000 X-MS-Exchange-Authentication-Results: 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 BY1PEPF0001AE17.mail.protection.outlook.com (10.167.242.107) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9366.7 via Frontend Transport; Wed, 26 Nov 2025 05:26:40 +0000 Received: from drhqmail201.nvidia.com (10.126.190.180) 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 15.2.2562.20; Tue, 25 Nov 2025 21:26:29 -0800 Received: from drhqmail203.nvidia.com (10.126.190.182) by drhqmail201.nvidia.com (10.126.190.180) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Tue, 25 Nov 2025 21:26:29 -0800 Received: from gb-nvl-073-compute01.l16.internal032k18.bmc032b17.internal032f11.internal032huang.bmc032l04.bmc (10.127.8.11) 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 15.2.2562.20 via Frontend Transport; Tue, 25 Nov 2025 21:26:29 -0800 From: To: , , , , , , , , CC: , , , , , , , , , , , , , , , , Subject: [PATCH v7 5/6] vfio/nvgrace-gpu: Inform devmem unmapped after reset Date: Wed, 26 Nov 2025 05:26:26 +0000 Message-ID: <20251126052627.43335-6-ankita@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251126052627.43335-1-ankita@nvidia.com> References: <20251126052627.43335-1-ankita@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BY1PEPF0001AE17:EE_|BL3PR12MB6644:EE_ X-MS-Office365-Filtering-Correlation-Id: da328c88-db5b-44fd-3154-08de2cac60b3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|7416014|376014|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?2w8XS0DboTNz1QPpjOBMB2ze0Ps2rUmgz34DUAnN5+H9rCT7zWTlL6ozfxyA?= =?us-ascii?Q?EeMkLrWGdHhjWO6/ZWS2sZTfMGuLbALZbDiPaQpRWmT3DhUal6bagQf61hoE?= =?us-ascii?Q?M8ZK9CaWwvviVsFLAaXYVbTn1xrFxBpQqmen8h0cbP/HqisgsrSiPaeMN3Fm?= =?us-ascii?Q?RH+YPE1YKLq1HOxUFHx3vD0VgFEqHVUk/7W8/f8uLCiLHWzL94YvPSUJyq+I?= =?us-ascii?Q?+kjXLUXJiwDcceP2vQEUMOwViYg0AT8PHzmynrHaBP+lst62YulkKBDrKwk0?= =?us-ascii?Q?sMXymuwhdKOOz2mv6zt2U8MrKF7Unf+dof63Un5g84bQFhfkgZQOoYf5yRyG?= =?us-ascii?Q?yQf5nALsqT1d4E8jpFROUhjBWPYTlhMFh7ECtTNNdJP89vvGMF/2IpG37Wmd?= =?us-ascii?Q?qoKQnMlFxDk08cYX7Fs+MaByG0BESvMZEKAXG5eHAQBRRmJAt1YuAmLEUoq8?= =?us-ascii?Q?Y/bD4V39+qNxAihWNjHuWhUfiiN8xaGBu+RpiU3heGl9ZG7WkCy006lUDm2N?= =?us-ascii?Q?FPDcKvoutryJyPigECjs3Gw3bsvdzMwuO80cDRsLlN1mXnpIvFBSfqcpPCH+?= =?us-ascii?Q?1aqgoauCG/TDvfreq3LFNYXUFSRPytslhX6lRZGAQ4mXobkgWJZyn3+pijRp?= =?us-ascii?Q?Y5CNolVEwTBpaPyxiLkwn68I0A1Th+KuiO7aPBFEaKyzVzQi2To22ssQyv75?= =?us-ascii?Q?x524aaA9tdDSVuCCpUVZSM+rmPM+Q+upWlK+zjD4iKKxnRiNDXtGuVdZ4vxm?= =?us-ascii?Q?G+JGSVANdjEQ5XIeYjJaU/k00NAalcey4Wo2Aageem8UZddaVpJj5EXeoL3E?= =?us-ascii?Q?IJrEIs2DPESZwPR64z2Z7cn3TJFNUQIouXhLo3+5V4tkPN2DaDeH1TfdW0r+?= =?us-ascii?Q?+ss/MV8gjUJI57yiSVh7Uex3WtNTVwPlM24fpswup+xgwWr7u9x0M0A/1bIp?= =?us-ascii?Q?6up/zY9V0lS7U1ttCBSNA+lnQY7rj5aFTpCTx4wfzUOxJz+hb08akZ5nkLOU?= =?us-ascii?Q?+JRUCapV0rZiEneoTXHPsbBPeyi7OpSUYahBAEG7156uroosdA8vqtLJAbcl?= =?us-ascii?Q?vMqg7/rDb6FxNH0GMf+ljm+RRcZNOXuYgKTBkj+3JTiUpT+WSgszp1fKcicg?= =?us-ascii?Q?7xhj7D0yer6Yu2SnX9ts1nlOIvlPzxB0/IVJg5+dzLjBMu+QzqofXUWi82tv?= =?us-ascii?Q?qTF1xxLzkcs15x2S/DZfjb6raha3i0Y6obWhf0kOPaLS/gtsFZ5/ONyuqxUJ?= =?us-ascii?Q?Np9l858UP5L9lNilcF1Y78upR3fjQx3ehbo7DKD82o2M8XOgp99YmcADfZJG?= =?us-ascii?Q?9PZDKy1nXCDCtHHUrIzMa3eIE74AWcB5Qbvc7IWfY7WCgyNj4K3YnhklGzMd?= =?us-ascii?Q?Y2TBYp5LSadnEF5cMIxsql4p4qP89qRhePEB2dNQK69pwfcDIRDLyFaT2tzu?= =?us-ascii?Q?5sk+S+5Om0juvEpv69NLLMNmZPK0qSA3zZ0VMgIruNqw3bwUlEL2lOQCL2pf?= =?us-ascii?Q?zuKWQM9T3arcHmlEKcKz5PlNKSb/8+Szp4zBkYH186lFC+TD+Mbt6Goyx0Ih?= =?us-ascii?Q?8t/dTvmTcVR8bMa8SrY=3D?= 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)(36860700013)(82310400026)(7416014)(376014)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Nov 2025 05:26:40.1368 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: da328c88-db5b-44fd-3154-08de2cac60b3 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: BY1PEPF0001AE17.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL3PR12MB6644 Content-Type: text/plain; charset="utf-8" From: Ankit Agrawal Introduce a new flag reset_done to notify that the GPU has just been reset and the mapping to the GPU memory is zapped. Implement the reset_done handler to set this new variable. It will be used later in the patches to wait for the GPU memory to be ready before doing any mapping or access. Cc: Jason Gunthorpe Suggested-by: Alex Williamson Signed-off-by: Ankit Agrawal --- drivers/vfio/pci/nvgrace-gpu/main.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/drivers/vfio/pci/nvgrace-gpu/main.c b/drivers/vfio/pci/nvgrace= -gpu/main.c index f691deb8e43c..b46984e76be7 100644 --- a/drivers/vfio/pci/nvgrace-gpu/main.c +++ b/drivers/vfio/pci/nvgrace-gpu/main.c @@ -58,6 +58,8 @@ struct nvgrace_gpu_pci_core_device { /* Lock to control device memory kernel mapping */ struct mutex remap_lock; bool has_mig_hw_bug; + /* GPU has just been reset */ + bool reset_done; }; =20 static void nvgrace_gpu_init_fake_bar_emu_regs(struct vfio_device *core_vd= ev) @@ -1048,12 +1050,34 @@ static const struct pci_device_id nvgrace_gpu_vfio_= pci_table[] =3D { =20 MODULE_DEVICE_TABLE(pci, nvgrace_gpu_vfio_pci_table); =20 +/* + * The GPU reset is required to be serialized against the *first* mapping + * faults and read/writes accesses to prevent potential RAS events logging. + * + * The reset_done implementation is triggered on every reset and is used + * set the reset_done variable that assists in achieving the serialization. + */ +static void nvgrace_gpu_vfio_pci_reset_done(struct pci_dev *pdev) +{ + struct vfio_pci_core_device *core_device =3D dev_get_drvdata(&pdev->dev); + struct nvgrace_gpu_pci_core_device *nvdev =3D + container_of(core_device, struct nvgrace_gpu_pci_core_device, + core_device); + + nvdev->reset_done =3D true; +} + +static const struct pci_error_handlers nvgrace_gpu_vfio_pci_err_handlers = =3D { + .reset_done =3D nvgrace_gpu_vfio_pci_reset_done, + .error_detected =3D vfio_pci_core_aer_err_detected, +}; + static struct pci_driver nvgrace_gpu_vfio_pci_driver =3D { .name =3D KBUILD_MODNAME, .id_table =3D nvgrace_gpu_vfio_pci_table, .probe =3D nvgrace_gpu_probe, .remove =3D nvgrace_gpu_remove, - .err_handler =3D &vfio_pci_core_err_handlers, + .err_handler =3D &nvgrace_gpu_vfio_pci_err_handlers, .driver_managed_dma =3D true, }; =20 --=20 2.34.1