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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.12 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.12; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.12) by DS1PEPF0001709B.mail.protection.outlook.com (10.167.18.105) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8158.14 via Frontend Transport; Tue, 19 Nov 2024 00:39:30 +0000 Received: from ethanolx50f7host.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 15.1.2507.39; Mon, 18 Nov 2024 18:39:27 -0600 From: Smita Koralahalli To: , , CC: Ard Biesheuvel , Alison Schofield , Vishal Verma , "Ira Weiny" , Dan Williams , Jonathan Cameron , Yazen Ghannam , Terry Bowman , "Smita Koralahalli" Subject: [PATCH v3 6/7] acpi/ghes, cper: Recognize and cache CXL Protocol errors Date: Tue, 19 Nov 2024 00:39:14 +0000 Message-ID: <20241119003915.174386-7-Smita.KoralahalliChannabasappa@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20241119003915.174386-1-Smita.KoralahalliChannabasappa@amd.com> References: <20241119003915.174386-1-Smita.KoralahalliChannabasappa@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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: DS1PEPF0001709B:EE_|SJ2PR12MB8652:EE_ X-MS-Office365-Filtering-Correlation-Id: 4501131e-541e-4fe5-4da3-08dd0832a189 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|82310400026|36860700013; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Nov 2024 00:39:30.6901 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4501131e-541e-4fe5-4da3-08dd0832a189 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.12];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS1PEPF0001709B.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8652 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add support in GHES to detect and process CXL CPER Protocol errors, as defined in UEFI v2.10, section N.2.13. Define struct cxl_cper_prot_err_work_data to cache CXL protocol error information, including RAS capabilities and severity, for further handling. These cached CXL CPER records will later be processed by workqueues within the CXL subsystem. Signed-off-by: Smita Koralahalli --- drivers/acpi/apei/ghes.c | 52 ++++++++++++++++++++++++++++++++++++++++ include/cxl/event.h | 6 +++++ 2 files changed, 58 insertions(+) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 62ffe6eb5503..6cd9d5375d7c 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -676,6 +676,54 @@ static void ghes_defer_non_standard_event(struct acpi_= hest_generic_data *gdata, schedule_work(&entry->work); } =20 +static void cxl_cper_post_prot_err(struct cxl_cper_sec_prot_err *prot_err, + int severity) +{ + struct cxl_cper_prot_err_work_data wd; + u8 *dvsec_start, *cap_start; + + if (!(prot_err->valid_bits & PROT_ERR_VALID_AGENT_ADDRESS)) { + pr_err_ratelimited("CXL CPER invalid agent type\n"); + return; + } + + if (!(prot_err->valid_bits & PROT_ERR_VALID_ERROR_LOG)) { + pr_err_ratelimited("CXL CPER invalid protocol error log\n"); + return; + } + + if (prot_err->err_len !=3D sizeof(struct cxl_ras_capability_regs)) { + pr_err_ratelimited("CXL CPER invalid RAS Cap size (%u)\n", + prot_err->err_len); + return; + } + + if (!(prot_err->valid_bits & PROT_ERR_VALID_SERIAL_NUMBER)) + pr_warn(FW_WARN "CXL CPER no device serial number\n"); + + switch (prot_err->agent_type) { + case RCD: + case DEVICE: + case LD: + case FMLD: + case RP: + case DSP: + case USP: + memcpy(&wd.prot_err, prot_err, sizeof(wd.prot_err)); + + dvsec_start =3D (u8 *)(prot_err + 1); + cap_start =3D dvsec_start + prot_err->dvsec_len; + + wd.ras_cap =3D *(struct cxl_ras_capability_regs *)cap_start; + wd.severity =3D cper_severity_to_aer(severity); + break; + default: + pr_err_ratelimited("CXL CPER invalid agent type: %d\n", + prot_err->agent_type); + return; + } +} + /* Room for 8 entries for each of the 4 event log queues */ #define CXL_CPER_FIFO_DEPTH 32 DEFINE_KFIFO(cxl_cper_fifo, struct cxl_cper_work_data, CXL_CPER_FIFO_DEPTH= ); @@ -795,6 +843,10 @@ static bool ghes_do_proc(struct ghes *ghes, } else if (guid_equal(sec_type, &CPER_SEC_PROC_ARM)) { queued =3D ghes_handle_arm_hw_error(gdata, sev, sync); + } else if (guid_equal(sec_type, &CPER_SEC_CXL_PROT_ERR)) { + struct cxl_cper_sec_prot_err *prot_err =3D acpi_hest_get_payload(gdata); + + cxl_cper_post_prot_err(prot_err, gdata->error_severity); } else if (guid_equal(sec_type, &CPER_SEC_CXL_GEN_MEDIA_GUID)) { struct cxl_cper_event_rec *rec =3D acpi_hest_get_payload(gdata); =20 diff --git a/include/cxl/event.h b/include/cxl/event.h index 992568b35455..c9a38ebaf207 100644 --- a/include/cxl/event.h +++ b/include/cxl/event.h @@ -232,6 +232,12 @@ struct cxl_ras_capability_regs { u32 header_log[16]; }; =20 +struct cxl_cper_prot_err_work_data { + struct cxl_cper_sec_prot_err prot_err; + struct cxl_ras_capability_regs ras_cap; + int severity; +}; + #ifdef CONFIG_ACPI_APEI_GHES int cxl_cper_register_event_work(struct work_struct *work); int cxl_cper_unregister_event_work(struct work_struct *work); --=20 2.17.1