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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 BL6PEPF0001AB4B.mail.protection.outlook.com (10.167.242.69) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6954.20 via Frontend Transport; Thu, 2 Nov 2023 15:52:38 +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 15.1.2507.32; Thu, 2 Nov 2023 10:52:37 -0500 From: Terry Bowman To: , , , , , , , CC: , , , Subject: [PATCH] cxl/pci: Change CXL AER support check to use native AER Date: Thu, 2 Nov 2023 10:52:32 -0500 Message-ID: <20231102155232.1421261-1-terry.bowman@amd.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: BL6PEPF0001AB4B:EE_|CY8PR12MB7731:EE_ X-MS-Office365-Filtering-Correlation-Id: 18322f65-bd35-4f24-6127-08dbdbbbbf3c 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: 02 Nov 2023 15:52:38.8548 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 18322f65-bd35-4f24-6127-08dbdbbbbf3c 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: BL6PEPF0001AB4B.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB7731 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Native CXL protocol errors are delivered to the OS through AER reporting. The owner of AER owns CXL Protocol error management with respect to _OSC negotiation.[1] CXL device errors are handled by a separate interrupt with native control gated by _OSC control field 'CXL Memory Error Reporting Control'. The CXL driver incorrectly checks for 'CXL Memory Error Reporting Control' before accessing AER registers and caching RCH downport AER registers. Replace the current check in these 2 cases with native AER checks. [1] CXL 3.0 - 9.17.2 CXL _OSC, Table-9-26, Interpretation of CXL _OSC Support Fields, p.641 Fixes: 5d2ffbe4b81a ("cxl/port: Store the downstream port's Component Regis= ter mappings in struct cxl_dport") Signed-off-by: Terry Bowman Reviewed-by: Smita Koralahalli --- drivers/cxl/core/pci.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c index 01c441f2e25e..b29f6d09744b 100644 --- a/drivers/cxl/core/pci.c +++ b/drivers/cxl/core/pci.c @@ -812,7 +812,7 @@ static void cxl_disable_rch_root_ints(struct cxl_dport = *dport) * the root cmd register's interrupts is required. But, PCI spec * shows these are disabled by default on reset. */ - if (bridge->native_cxl_error) { + if (bridge->native_aer) { aer_cmd_mask =3D (PCI_ERR_ROOT_CMD_COR_EN | PCI_ERR_ROOT_CMD_NONFATAL_EN | PCI_ERR_ROOT_CMD_FATAL_EN); @@ -828,7 +828,7 @@ void cxl_setup_parent_dport(struct device *host, struct= cxl_dport *dport) struct pci_host_bridge *host_bridge; =20 host_bridge =3D to_pci_host_bridge(dport_dev); - if (host_bridge->native_cxl_error) + if (host_bridge->native_aer) dport->rcrb.aer_cap =3D cxl_rcrb_to_aer(dport_dev, dport->rcrb.base); =20 dport->reg_map.host =3D host; --=20 2.34.1