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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CY4PEPF0000EE32.mail.protection.outlook.com (10.167.242.38) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6521.17 via Frontend Transport; Wed, 21 Jun 2023 03:51:32 +0000 Received: from onyx-7400host.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23; Tue, 20 Jun 2023 22:51:27 -0500 From: Avadhut Naik To: , , , , CC: , , , Subject: [PATCH v4 0/4] Add support for Vendor Defined Error Types in Einj Module Date: Wed, 21 Jun 2023 03:50:58 +0000 Message-ID: <20230621035102.13463-1-avadhut.naik@amd.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EE32:EE_|DS7PR12MB5743:EE_ X-MS-Office365-Filtering-Correlation-Id: b5cec050-75b8-417f-f9b4-08db720acd7a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jun 2023 03:51:32.4591 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b5cec050-75b8-417f-f9b4-08db720acd7a X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EE32.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB5743 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Avadhut Naik This patchset adds support for Vendor Defined Error types in the einj module by exporting a binary blob file in module's debugfs directory. Userspace tools can write OEM Defined Structures into the blob file as part of injecting Vendor defined errors. The first patch refactors available_error_type_show() function to ensure all errors supported by the platform are output through einj module's available_error_type file in debugfs. The second patch adds a write callback for binary blobs created through debugfs_create_blob() API. The third patch fixes the permissions of panicinfo file in debugfs to ensure it remains read-only The fourth patch adds the required support i.e. establishing the memory mapping and exporting it through debugfs blob file for Vendor-defined Error types. Changes in v2: - Split the v1 patch, as was recommended, to have a separate patch for changes in debugfs. - Refactored available_error_type_show() function into a separate patch. - Changed file permissions to octal format to remove checkpatch warnings. Changes in v3: - Use BIT macro for generating error masks instead of hex values since ACPI spec uses bit numbers. - Handle the corner case of acpi_os_map_iomem() returning NULL through a local variable to a store the size of OEM defined data structure. Changes in v4: - Fix permissions for panicinfo file in debugfs. - Replace acpi_os_map_iomem() and acpi_os_unmap_iomem() calls with acpi_os_map_memory() and acpi_os_unmap_memory() respectively to avert sparse warnings as suggested by Alexey. Avadhut Naik (4): ACPI: APEI: EINJ: Refactor available_error_type_show() fs: debugfs: Add write functionality to debugfs blobs platform/chrome: cros_ec_debugfs: Fix permissions for panicinfo ACPI: APEI: EINJ: Add support for vendor defined error types drivers/acpi/apei/einj.c | 67 ++++++++++++++++------- drivers/platform/chrome/cros_ec_debugfs.c | 2 +- fs/debugfs/file.c | 28 ++++++++-- 3 files changed, 70 insertions(+), 27 deletions(-) -- 2.34.1