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GET /api/patches/2217641/?format=api
{ "id": 2217641, "url": "http://patchwork.ozlabs.org/api/patches/2217641/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260330094203.38022-4-kaihengf@nvidia.com/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/projects/28/?format=api", "name": "Linux PCI development", "link_name": "linux-pci", "list_id": "linux-pci.vger.kernel.org", "list_email": "linux-pci@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260330094203.38022-4-kaihengf@nvidia.com>", "list_archive_url": null, "date": "2026-03-30T09:41:57", "name": "[v3,3/3] ACPI: APEI: GHES: Add NVIDIA vendor CPER record handler", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "9abeac697939ac0b398bf3fab8b4c909ebed115f", "submitter": { "id": 89451, "url": "http://patchwork.ozlabs.org/api/people/89451/?format=api", "name": "Kai-Heng Feng", "email": "kaihengf@nvidia.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260330094203.38022-4-kaihengf@nvidia.com/mbox/", "series": [ { "id": 497990, "url": "http://patchwork.ozlabs.org/api/series/497990/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=497990", "date": "2026-03-30T09:41:56", "name": "ACPI: APEI: GHES: Add device-managed notifier helper and NVIDIA CPER handler", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/497990/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2217641/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2217641/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-pci+bounces-51434-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-pci@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256\n header.s=selector2 header.b=JvItaTnO;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.232.135.74; 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R. Silva\" <gustavoars@kernel.org>,\n\tGavin Shan <gshan@redhat.com>,\n\tHuang Yiwei <quic_hyiwei@quicinc.com>,\n\tNathan Chancellor <nathan@kernel.org>,\n\tDave Jiang <dave.jiang@intel.com>,\n\t\"Fabio M. De Francesco\" <fabio.m.de.francesco@linux.intel.com>", "Subject": "[PATCH v3 3/3] ACPI: APEI: GHES: Add NVIDIA vendor CPER record\n handler", "Date": "Mon, 30 Mar 2026 17:41:57 +0800", "Message-ID": "<20260330094203.38022-4-kaihengf@nvidia.com>", "X-Mailer": "git-send-email 2.50.1", "In-Reply-To": "<20260330094203.38022-1-kaihengf@nvidia.com>", "References": "<20260330094203.38022-1-kaihengf@nvidia.com>", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-ClientProxiedBy": "TPYP295CA0006.TWNP295.PROD.OUTLOOK.COM\n (2603:1096:7d0:9::16) To PH7PR12MB7914.namprd12.prod.outlook.com\n (2603:10b6:510:27d::13)", "Precedence": "bulk", "X-Mailing-List": "linux-pci@vger.kernel.org", "List-Id": "<linux-pci.vger.kernel.org>", "List-Subscribe": "<mailto:linux-pci+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-pci+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "X-MS-PublicTrafficType": "Email", "X-MS-TrafficTypeDiagnostic": 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", "X-OriginatorOrg": "Nvidia.com", "X-MS-Exchange-CrossTenant-Network-Message-Id": "\n 64da0bea-24a7-481c-71b8-08de8e40ade2", "X-MS-Exchange-CrossTenant-AuthSource": "PH7PR12MB7914.namprd12.prod.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Internal", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "30 Mar 2026 09:42:38.1835\n (UTC)", "X-MS-Exchange-CrossTenant-FromEntityHeader": "Hosted", "X-MS-Exchange-CrossTenant-Id": "43083d15-7273-40c1-b7db-39efd9ccc17a", "X-MS-Exchange-CrossTenant-MailboxType": "HOSTED", "X-MS-Exchange-CrossTenant-UserPrincipalName": "\n jv6LdTnYO3mxet3FMMBGcbBUy+EXPJAFT5mQtVtQr0CXfw7XhKq4O41lqs53AkK4Ke/FIa2gbLTMexuAn50Ncg==", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "DS0PR12MB8246" }, "content": "Add support for decoding NVIDIA-specific CPER sections delivered via\nthe APEI GHES vendor record notifier chain. NVIDIA hardware generates\nvendor-specific CPER sections containing error signatures and diagnostic\nregister dumps. This implementation registers a notifier_block with the\nGHES vendor record notifier and decodes these sections, printing error\ndetails via dev_info().\n\nThe driver binds to ACPI device NVDA2012, present on NVIDIA server\nplatforms. The NVIDIA CPER section contains a fixed header with error\nmetadata (signature, error type, severity, socket) followed by\nvariable-length register address-value pairs for hardware diagnostics.\n\nThis work is based on libcper [0].\n\nExample output:\nnvidia-ghes NVDA2012:00: NVIDIA CPER section, error_data_length: 544\nnvidia-ghes NVDA2012:00: signature: CMET-INFO\nnvidia-ghes NVDA2012:00: error_type: 0\nnvidia-ghes NVDA2012:00: error_instance: 0\nnvidia-ghes NVDA2012:00: severity: 3\nnvidia-ghes NVDA2012:00: socket: 0\nnvidia-ghes NVDA2012:00: number_regs: 32\nnvidia-ghes NVDA2012:00: instance_base: 0x0000000000000000\nnvidia-ghes NVDA2012:00: register[0]: address=0x8000000100000000 value=0x0000000100000000\n\n[0] https://github.com/openbmc/libcper/commit/683e055061ce\nCc: Shiju Jose <shiju.jose@huawei.com>\nReviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>\nSigned-off-by: Kai-Heng Feng <kaihengf@nvidia.com>\n---\nv3:\n - NVIDIA_GHES to GHES_NVIDIA.\n - Better error handling in probe()\n - \"int i\" in for loop.\nv2:\n - Use right headers.\n - Use embedded struct and __counted_by.\n - Drop __packed.\n - Remove unecessary casts. \n - Use * in sizeof().\n - Use devm_kmalloc() and struct assignment.\n - Use dev_err_probe and new devm helper.\n\n MAINTAINERS | 6 ++\n drivers/acpi/apei/Kconfig | 14 +++\n drivers/acpi/apei/Makefile | 1 +\n drivers/acpi/apei/ghes-nvidia.c | 149 ++++++++++++++++++++++++++++++++\n 4 files changed, 170 insertions(+)\n create mode 100644 drivers/acpi/apei/ghes-nvidia.c", "diff": "diff --git a/MAINTAINERS b/MAINTAINERS\nindex c3fe46d7c4bc..94608f8e247e 100644\n--- a/MAINTAINERS\n+++ b/MAINTAINERS\n@@ -18919,6 +18919,12 @@ S:\tMaintained\n F:\tdrivers/video/fbdev/nvidia/\n F:\tdrivers/video/fbdev/riva/\n \n+NVIDIA GHES VENDOR CPER RECORD HANDLER\n+M:\tKai-Heng Feng <kaihengf@nvidia.com>\n+L:\tlinux-acpi@vger.kernel.org\n+S:\tMaintained\n+F:\tdrivers/acpi/apei/nvidia-ghes.c\n+\n NVIDIA VRS RTC DRIVER\n M:\tShubhi Garg <shgarg@nvidia.com>\n L:\tlinux-tegra@vger.kernel.org\ndiff --git a/drivers/acpi/apei/Kconfig b/drivers/acpi/apei/Kconfig\nindex 070c07d68dfb..428458c623f0 100644\n--- a/drivers/acpi/apei/Kconfig\n+++ b/drivers/acpi/apei/Kconfig\n@@ -74,6 +74,20 @@ config ACPI_APEI_EINJ_CXL\n \n \t If unsure say 'n'\n \n+config ACPI_APEI_GHES_NVIDIA\n+\ttristate \"NVIDIA GHES vendor record handler\"\n+\tdepends on ACPI_APEI_GHES\n+\thelp\n+\t Support for decoding NVIDIA-specific CPER sections delivered via\n+\t the APEI GHES vendor record notifier chain. Registers a handler\n+\t for the NVIDIA section GUID and logs error signatures, severity,\n+\t socket, and diagnostic register address-value pairs.\n+\n+\t Enable on NVIDIA server platforms (e.g. DGX, HGX) that expose\n+\t ACPI device NVDA2012 in their firmware tables.\n+\n+\t If unsure, say N.\n+\n config ACPI_APEI_ERST_DEBUG\n \ttristate \"APEI Error Record Serialization Table (ERST) Debug Support\"\n \tdepends on ACPI_APEI\ndiff --git a/drivers/acpi/apei/Makefile b/drivers/acpi/apei/Makefile\nindex 1a0b85923cd4..66588d6be56f 100644\n--- a/drivers/acpi/apei/Makefile\n+++ b/drivers/acpi/apei/Makefile\n@@ -10,5 +10,6 @@ obj-$(CONFIG_ACPI_APEI_EINJ)\t+= einj.o\n einj-y\t\t\t\t:= einj-core.o\n einj-$(CONFIG_ACPI_APEI_EINJ_CXL) += einj-cxl.o\n obj-$(CONFIG_ACPI_APEI_ERST_DEBUG) += erst-dbg.o\n+obj-$(CONFIG_ACPI_APEI_GHES_NVIDIA) += ghes-nvidia.o\n \n apei-y := apei-base.o hest.o erst.o bert.o\ndiff --git a/drivers/acpi/apei/ghes-nvidia.c b/drivers/acpi/apei/ghes-nvidia.c\nnew file mode 100644\nindex 000000000000..597275d81de8\n--- /dev/null\n+++ b/drivers/acpi/apei/ghes-nvidia.c\n@@ -0,0 +1,149 @@\n+// SPDX-License-Identifier: GPL-2.0-only\n+/*\n+ * NVIDIA GHES vendor record handler\n+ *\n+ * Copyright (c) 2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.\n+ */\n+\n+#include <linux/acpi.h>\n+#include <linux/module.h>\n+#include <linux/platform_device.h>\n+#include <linux/types.h>\n+#include <linux/uuid.h>\n+#include <acpi/ghes.h>\n+\n+static const guid_t nvidia_sec_guid =\n+\tGUID_INIT(0x6d5244f2, 0x2712, 0x11ec,\n+\t\t 0xbe, 0xa7, 0xcb, 0x3f, 0xdb, 0x95, 0xc7, 0x86);\n+\n+struct cper_sec_nvidia {\n+\tchar\tsignature[16];\n+\t__le16\terror_type;\n+\t__le16\terror_instance;\n+\tu8\tseverity;\n+\tu8\tsocket;\n+\tu8\tnumber_regs;\n+\tu8\treserved;\n+\t__le64\tinstance_base;\n+\tstruct {\n+\t\t__le64\taddr;\n+\t\t__le64\tval;\n+\t} regs[] __counted_by(number_regs);\n+};\n+\n+struct nvidia_ghes_private {\n+\tstruct notifier_block\tnb;\n+\tstruct device\t\t*dev;\n+};\n+\n+static void nvidia_ghes_print_error(struct device *dev,\n+\t\t\t\t const struct cper_sec_nvidia *nvidia_err,\n+\t\t\t\t size_t error_data_length, bool fatal)\n+{\n+\tconst char *level = fatal ? KERN_ERR : KERN_INFO;\n+\tsize_t min_size;\n+\n+\tdev_printk(level, dev, \"signature: %.16s\\n\", nvidia_err->signature);\n+\tdev_printk(level, dev, \"error_type: %u\\n\", le16_to_cpu(nvidia_err->error_type));\n+\tdev_printk(level, dev, \"error_instance: %u\\n\", le16_to_cpu(nvidia_err->error_instance));\n+\tdev_printk(level, dev, \"severity: %u\\n\", nvidia_err->severity);\n+\tdev_printk(level, dev, \"socket: %u\\n\", nvidia_err->socket);\n+\tdev_printk(level, dev, \"number_regs: %u\\n\", nvidia_err->number_regs);\n+\tdev_printk(level, dev, \"instance_base: 0x%016llx\\n\",\n+\t\t le64_to_cpu(nvidia_err->instance_base));\n+\n+\tif (nvidia_err->number_regs == 0)\n+\t\treturn;\n+\n+\t/*\n+\t * Validate that all registers fit within error_data_length.\n+\t * Each register pair is two little-endian u64s.\n+\t */\n+\tmin_size = struct_size(nvidia_err, regs, nvidia_err->number_regs);\n+\tif (error_data_length < min_size) {\n+\t\tdev_err(dev, \"Invalid number_regs %u (section size %zu, need %zu)\\n\",\n+\t\t\tnvidia_err->number_regs, error_data_length, min_size);\n+\t\treturn;\n+\t}\n+\n+\tfor (int i = 0; i < nvidia_err->number_regs; i++)\n+\t\tdev_printk(level, dev, \"register[%d]: address=0x%016llx value=0x%016llx\\n\",\n+\t\t\t i, le64_to_cpu(nvidia_err->regs[i].addr),\n+\t\t\t le64_to_cpu(nvidia_err->regs[i].val));\n+}\n+\n+static int nvidia_ghes_notify(struct notifier_block *nb,\n+\t\t\t unsigned long event, void *data)\n+{\n+\tstruct acpi_hest_generic_data *gdata = data;\n+\tstruct nvidia_ghes_private *priv;\n+\tconst struct cper_sec_nvidia *nvidia_err;\n+\tguid_t sec_guid;\n+\n+\timport_guid(&sec_guid, gdata->section_type);\n+\tif (!guid_equal(&sec_guid, &nvidia_sec_guid))\n+\t\treturn NOTIFY_DONE;\n+\n+\tpriv = container_of(nb, struct nvidia_ghes_private, nb);\n+\n+\tif (acpi_hest_get_error_length(gdata) < sizeof(*nvidia_err)) {\n+\t\tdev_err(priv->dev, \"Section too small (%d < %zu)\\n\",\n+\t\t\tacpi_hest_get_error_length(gdata), sizeof(*nvidia_err));\n+\t\treturn NOTIFY_OK;\n+\t}\n+\n+\tnvidia_err = acpi_hest_get_payload(gdata);\n+\n+\tif (event >= GHES_SEV_RECOVERABLE)\n+\t\tdev_err(priv->dev, \"NVIDIA CPER section, error_data_length: %u\\n\",\n+\t\t\tacpi_hest_get_error_length(gdata));\n+\telse\n+\t\tdev_info(priv->dev, \"NVIDIA CPER section, error_data_length: %u\\n\",\n+\t\t\t acpi_hest_get_error_length(gdata));\n+\n+\tnvidia_ghes_print_error(priv->dev, nvidia_err, acpi_hest_get_error_length(gdata),\n+\t\t\t\tevent >= GHES_SEV_RECOVERABLE);\n+\n+\treturn NOTIFY_OK;\n+}\n+\n+static int nvidia_ghes_probe(struct platform_device *pdev)\n+{\n+\tstruct nvidia_ghes_private *priv;\n+\tint ret;\n+\n+\tpriv = devm_kmalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);\n+\tif (!priv)\n+\t\treturn -ENOMEM;\n+\n+\t*priv = (struct nvidia_ghes_private) {\n+\t\t.nb.notifier_call = nvidia_ghes_notify,\n+\t\t.dev = &pdev->dev,\n+\t};\n+\n+\tret = devm_ghes_register_vendor_record_notifier(&pdev->dev, &priv->nb);\n+\tif (ret)\n+\t\treturn dev_err_probe(&pdev->dev, ret,\n+\t\t\t\t \"Failed to register NVIDIA GHES vendor record notifier\\n\");\n+\n+\treturn 0;\n+}\n+\n+static const struct acpi_device_id nvidia_ghes_acpi_match[] = {\n+\t{ \"NVDA2012\" },\n+\t{ }\n+};\n+MODULE_DEVICE_TABLE(acpi, nvidia_ghes_acpi_match);\n+\n+static struct platform_driver nvidia_ghes_driver = {\n+\t.driver = {\n+\t\t.name = \"nvidia-ghes\",\n+\t\t.acpi_match_table = nvidia_ghes_acpi_match,\n+\t},\n+\t.probe = nvidia_ghes_probe,\n+};\n+module_platform_driver(nvidia_ghes_driver);\n+\n+MODULE_AUTHOR(\"Kai-Heng Feng <kaihengf@nvidia.com>\");\n+MODULE_DESCRIPTION(\"NVIDIA GHES vendor CPER record handler\");\n+MODULE_LICENSE(\"GPL\");\n", "prefixes": [ "v3", "3/3" ] }