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client-ip=165.204.84.17; helo=satlexmb07.amd.com; pr=C Received: from satlexmb07.amd.com (165.204.84.17) by BL6PEPF0001AB53.mail.protection.outlook.com (10.167.241.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9587.10 via Frontend Transport; Tue, 3 Feb 2026 02:53:33 +0000 Received: from ethanolx7ea3host.amd.com (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Mon, 2 Feb 2026 20:53:33 -0600 From: Terry Bowman To: , , , , , , , , , , , , , , , , , , CC: , , Subject: [PATCH v15 3/9] PCI/ERR: Introduce PCI_ERS_RESULT_PANIC Date: Mon, 2 Feb 2026 20:52:38 -0600 Message-ID: <20260203025244.3093805-4-terry.bowman@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260203025244.3093805-1-terry.bowman@amd.com> References: <20260203025244.3093805-1-terry.bowman@amd.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-ClientProxiedBy: satlexmb08.amd.com (10.181.42.217) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB53:EE_|MN2PR12MB4173:EE_ X-MS-Office365-Filtering-Correlation-Id: 30ebe582-8362-42b7-1e77-08de62cf6bd0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700013|82310400026|7416014|376014|921020; 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charset="utf-8" The CXL driver's uncorrectable (UCE) protocol error handling will be updated in the future. One required change is for the error handlers to force a system panic when a UCE is detected. Introduce PCI_ERS_RESULT_PANIC as a 'enum pci_ers_result' type. This will be used by CXL UCE fatal and non-fatal recovery in future patches. Update PCIe recovery documentation with details of PCI_ERS_RESULT_PANIC. Signed-off-by: Terry Bowman Reviewed-by: Dave Jiang Reviewed-by: Jonathan Cameron Reviewed-by: Ben Cheatham Reviewed-by: Dan Williams --- Changes in v14 -> v15: - None Changes in v13 -> v14: - Add review-by for Dan - Update Title prefix (Bjorn) - Removed merge_result. Only logging error for device reporting the error (Dan) Changes in v12->v13: - Add Dave Jiang's, Jonathan's, Ben's review-by - Typo fix (Ben) Changes v11 -> v12: - Documentation requested (Lukas) --- Documentation/PCI/pci-error-recovery.rst | 2 ++ include/linux/pci.h | 3 +++ 2 files changed, 5 insertions(+) diff --git a/Documentation/PCI/pci-error-recovery.rst b/Documentation/PCI/p= ci-error-recovery.rst index 43bc4e3665b4..82ee2c8c0450 100644 --- a/Documentation/PCI/pci-error-recovery.rst +++ b/Documentation/PCI/pci-error-recovery.rst @@ -102,6 +102,8 @@ Possible return values are:: PCI_ERS_RESULT_NEED_RESET, /* Device driver wants slot to be reset. */ PCI_ERS_RESULT_DISCONNECT, /* Device has completely failed, is unrecove= rable */ PCI_ERS_RESULT_RECOVERED, /* Device driver is fully recovered and oper= ational */ + PCI_ERS_RESULT_NO_AER_DRIVER, /* No AER capabilities registered for the = driver */ + PCI_ERS_RESULT_PANIC, /* System is unstable, panic. Is CXL specifi= c */ }; =20 A driver does not have to implement all of these callbacks; however, diff --git a/include/linux/pci.h b/include/linux/pci.h index f8e8b3df794d..ee05d5925b13 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -921,6 +921,9 @@ enum pci_ers_result { =20 /* No AER capabilities registered for the driver */ PCI_ERS_RESULT_NO_AER_DRIVER =3D (__force pci_ers_result_t) 6, + + /* System is unstable, panic. Is CXL specific */ + PCI_ERS_RESULT_PANIC =3D (__force pci_ers_result_t) 7, }; =20 /* PCI bus error event callbacks */ --=20 2.34.1