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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Jul 2025 21:48:07.4912 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 72db3985-4561-4141-57bd-08ddcfb2c528 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: BL02EPF00021F69.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR12MB8811 Add necessary information to map the CXL Timeout & Isolation Capability (CXL 3.2 8.2.4.24). This will be used in later commits by the CXL core and PCIe portdrv driver to set up and manage the capability. Signed-off-by: Ben Cheatham --- drivers/cxl/core/regs.c | 8 ++++++++ drivers/cxl/cxl.h | 7 +++++++ 2 files changed, 15 insertions(+) diff --git a/drivers/cxl/core/regs.c b/drivers/cxl/core/regs.c index da8e668a3b70..bdc1eb59d69c 100644 --- a/drivers/cxl/core/regs.c +++ b/drivers/cxl/core/regs.c @@ -92,6 +92,13 @@ void cxl_probe_component_regs(struct device *dev, void __iomem *base, length = CXL_RAS_CAPABILITY_LENGTH; rmap = &map->ras; break; + case CXL_CM_CAP_CAP_ID_ISOLATION: + dev_dbg(dev, + "found Timeout & Isolation capability (0x%x)\n", + offset); + length = CXL_ISOLATION_CAPABILITY_LENGTH; + rmap = &map->isolation; + break; default: dev_dbg(dev, "Unknown CM cap ID: %d (0x%x)\n", cap_id, offset); @@ -213,6 +220,7 @@ static int cxl_get_mapinfo(const struct cxl_register_map *map, struct mapinfo mapinfo[] = { { &map->component_map.hdm_decoder, ®s->hdm_decoder }, { &map->component_map.ras, ®s->ras }, + { &map->component_map.isolation, ®s->isolation }, }; int i; diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index a0fda305e25b..3013ba600ba3 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -41,6 +41,7 @@ extern const struct nvdimm_security_ops *cxl_security_ops; #define CXL_CM_CAP_CAP_ID_RAS 0x2 #define CXL_CM_CAP_CAP_ID_HDM 0x5 +#define CXL_CM_CAP_CAP_ID_ISOLATION 0x9 #define CXL_CM_CAP_CAP_HDM_VERSION 1 /* HDM decoders CXL 2.0 8.2.5.12 CXL HDM Decoder Capability Structure */ @@ -133,6 +134,9 @@ static inline int ways_to_eiw(unsigned int ways, u8 *eiw) return 0; } +/* CXL 3.2 8.2.4.24 CXL Timeout and Isolation Capability Structure */ +#define CXL_ISOLATION_CAPABILITY_LENGTH 0x10 + /* RAS Registers CXL 2.0 8.2.5.9 CXL RAS Capability Structure */ #define CXL_RAS_UNCORRECTABLE_STATUS_OFFSET 0x0 #define CXL_RAS_UNCORRECTABLE_STATUS_MASK (GENMASK(16, 14) | GENMASK(11, 0)) @@ -211,10 +215,12 @@ struct cxl_regs { * Common set of CXL Component register block base pointers * @hdm_decoder: CXL 2.0 8.2.5.12 CXL HDM Decoder Capability Structure * @ras: CXL 2.0 8.2.5.9 CXL RAS Capability Structure + * @isolation: CXL 3.2 8.2.4.24 CXL Timeout & Isolation Capability Structure */ struct_group_tagged(cxl_component_regs, component, void __iomem *hdm_decoder; void __iomem *ras; + void __iomem *isolation; ); /* * Common set of CXL Device register block base pointers @@ -257,6 +263,7 @@ struct cxl_reg_map { struct cxl_component_reg_map { struct cxl_reg_map hdm_decoder; struct cxl_reg_map ras; + struct cxl_reg_map isolation; }; struct cxl_device_reg_map { -- 2.34.1