From 6aec00139d3a83e2394d4bcb0084e872b4036e8f Mon Sep 17 00:00:00 2001 From: Alison Schofield Date: Tue, 30 Apr 2024 10:28:06 -0700 Subject: cxl/core: Add region info to cxl_general_media and cxl_dram events User space may need to know which region, if any, maps the DPAs (device physical addresses) reported in a cxl_general_media or cxl_dram event. Since the mapping can change, the kernel provides this information at the time the event occurs. This informs user space that at event this mapped this to this . Add the same region info that is included in the cxl_poison trace event: the DPA->HPA translation, region name, and region uuid. The new fields are inserted in the trace event and no existing fields are modified. If the DPA is not mapped, user will see: hpa=ULLONG_MAX, region="", and uuid=0 This work must be protected by dpa_rwsem & region_rwsem since it is looking up region mappings. Signed-off-by: Alison Schofield Reviewed-by: Dan Williams Reviewed-by: Ira Weiny Reviewed-by: Jonathan Cameron Link: https://lore.kernel.org/r/dd8d708b7a7ebfb64a27020a5eb338091336b34d.1714496730.git.alison.schofield@intel.com Signed-off-by: Dave Jiang --- include/linux/cxl-event.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'include') diff --git a/include/linux/cxl-event.h b/include/linux/cxl-event.h index 03fa6d50d46f..5342755777cc 100644 --- a/include/linux/cxl-event.h +++ b/include/linux/cxl-event.h @@ -91,11 +91,21 @@ struct cxl_event_mem_module { u8 reserved[0x3d]; } __packed; +/* + * General Media or DRAM Event Common Fields + * - provides common access to phys_addr + */ +struct cxl_event_common { + struct cxl_event_record_hdr hdr; + __le64 phys_addr; +} __packed; + union cxl_event { struct cxl_event_generic generic; struct cxl_event_gen_media gen_media; struct cxl_event_dram dram; struct cxl_event_mem_module mem_module; + struct cxl_event_common common; } __packed; /* -- cgit v1.2.3