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Wed, 19 Jul 2023 14:23:25 -0500 From: Smita Koralahalli To: , , CC: Bjorn Helgaas , , Lukas Wunner , Kuppuswamy Sathyanarayanan , Mahesh J Salgaonkar , Alison Schofield , "Vishal Verma" , Ira Weiny , "Ben Widawsky" , Dan Williams , Jonathan Cameron , Yazen Ghannam , Terry Bowman , Robert Richter , Smita Koralahalli Subject: [PATCH 2/2] cxl/pci: Fix appropriate checking for _OSC while handling CXL RAS registers Date: Wed, 19 Jul 2023 19:23:13 +0000 Message-ID: <20230719192313.38591-3-Smita.KoralahalliChannabasappa@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230719192313.38591-1-Smita.KoralahalliChannabasappa@amd.com> References: <20230719192313.38591-1-Smita.KoralahalliChannabasappa@amd.com> MIME-Version: 1.0 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: CO1NAM11FT023:EE_|MW3PR12MB4364:EE_ X-MS-Office365-Filtering-Correlation-Id: b33d5df1-9777-4e15-1e40-08db888da14a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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And the CXL RAS Cap registers reported on Protocol errors should check for AER _OSC rather than CXL Memory Error Reporting Control _OSC. The CXL Memory Error Reporting Control _OSC specifically highlights handling Memory Error Logging and Signaling Enhancements. These kinds of errors are reported through a device's mailbox and can be managed independently from CXL Protocol Errors. [1] Compute Express Link (CXL) Specification, Revision 3.1, Aug 1 2022. Signed-off-by: Smita Koralahalli --- drivers/cxl/pci.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c index 1cb1494c28fe..44a21ab7add5 100644 --- a/drivers/cxl/pci.c +++ b/drivers/cxl/pci.c @@ -529,7 +529,6 @@ static int cxl_pci_setup_regs(struct pci_dev *pdev, enum cxl_regloc_type type, static int cxl_pci_ras_unmask(struct pci_dev *pdev) { - struct pci_host_bridge *host_bridge = pci_find_host_bridge(pdev->bus); struct cxl_dev_state *cxlds = pci_get_drvdata(pdev); void __iomem *addr; u32 orig_val, val, mask; @@ -541,9 +540,9 @@ static int cxl_pci_ras_unmask(struct pci_dev *pdev) return 0; } - /* BIOS has CXL error control */ - if (!host_bridge->native_cxl_error) - return -ENXIO; + /* BIOS has PCIe AER error control */ + if (!pcie_aer_is_native(pdev)) + return 0; rc = pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &cap); if (rc)