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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 DM6NAM11FT029.mail.protection.outlook.com (10.13.173.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6222.22 via Frontend Transport; Thu, 23 Mar 2023 21:38:15 +0000 Received: from ethanolx7ea3host.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 15.1.2375.34; Thu, 23 Mar 2023 16:38:14 -0500 From: Terry Bowman To: , , , , , , , , , CC: , Subject: [PATCH v2 0/5] cxl/pci: Add support for RCH RAS error handling Date: Thu, 23 Mar 2023 16:38:03 -0500 Message-ID: <20230323213808.398039-1-terry.bowman@amd.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT029:EE_|PH8PR12MB7376:EE_ X-MS-Office365-Filtering-Correlation-Id: c7c6e527-a192-4d77-9955-08db2be6e8eb 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: 23 Mar 2023 21:38:15.2502 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c7c6e527-a192-4d77-9955-08db2be6e8eb 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: DM6NAM11FT029.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB7376 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org This patchset adds error handling support for restricted CXL host (RCH) downstream ports. This is necessary because RCH downstream ports are implemented in RCRBs and report protocol errors through a root complex event collector (RCEC). The RCH error reporting flow is not currently supported by the CXL driver and will be added by this patchset. This patchset uses an updated subject line and is a continuation of: https://lore.kernel.org/all/20221021185615.605233-1-terry.bowman@amd.com/ The first patch discovers the RCH dport AER and RAS registers. These will be mapped later and used in CXL driver error logging. The second patch exports cper_mem_err_unpack(). cper_mem_err_unpack() is a dependency for using the cper_print_aer() AER trace logging. The third patch exports cper_print_aer(). cper_print_aer() is used for CXL AER error logging because it provides a common format for logging into dmesg. The fourth patch is AER port driver changes for forwarding RCH errors to the RCiEP RCH handler. The fifth patch maps the AER and RAS registers. This patch also adds the RCH handler for logging downstream port AER and RAS information. This is based on cxl/next commit e686c32590f4 ("dax/kmem: Fix leak of memory-hotplug resources")' Robert Richter (1): cxl/pci: Forward RCH downstream port-detected errors to the CXL.mem dev handler Terry Bowman (4): cxl/pci: Add RCH downstream port AER and RAS register discovery efi/cper: Export cper_mem_err_unpack() for CXL logging pci/aer: Export cper_print_aer() for CXL driver logging cxl/pci: Add RCH downstream port error logging drivers/cxl/core/pci.c | 126 +++++++++++++++++++++++--- drivers/cxl/core/regs.c | 94 +++++++++++++++++--- drivers/cxl/cxl.h | 18 ++++ drivers/cxl/mem.c | 173 +++++++++++++++++++++++++++++++++--- drivers/firmware/efi/cper.c | 1 + drivers/pci/pcie/aer.c | 46 ++++++++++ 6 files changed, 423 insertions(+), 35 deletions(-) -- 2.34.1