This patchset adds logging support for CXL CPER endpoint and port protocol errors. The first 3 patches update the existing codebase to support CXL CPER Protocol error reporting. The last 3 patches introduce recognizing and reporting CXL CPER Protocol errors. Link to v5: https://lore.kernel.org/linux-cxl/20250114120427.149260-1-Smita.KoralahalliChannabasappa@xxxxxxx Changes in v5 -> v6: [Dave, Jonathan, Ira]: Reviewed-by tags. [Dave]: Check for cxlds before assigning fe. Merge one of the patches (Port error trace logging) from Terry's Port error handling. Rename host -> parent. Changes in v4 -> v5: [Dave]: Reviewed-by tags. [Jonathan]: Remove blank line. [Jonathan, Ira]: Change CXL -> "CXL". [Ira]: Fix build error for CONFIG_ACPI_APEI_PCIEAER. Changes in v3 -> v4: [Ira]: Use memcpy() for RAS Cap struct. [Jonathan]: Commit description edits. [Jonathan]: Use separate work registration functions for protocol and component errors. [Jonathan, Ira]: Replace flags with separate functions for port and device errors. [Jonathan]: Use goto for register and unregister calls. Changes in v2 -> v3: [Dan]: Define a new workqueue for CXL CPER Protocol errors and avoid reusing existing workqueue which handles CXL CPER events. [Dan] Update function and struct names. [Ira] Don't define common function get_cxl_devstate(). [Dan] Use switch cases rather than defining array of structures. [Dan] Pass the entire cxl_cper_prot_err struct for CXL subsystem. [Dan] Use pr_err_ratelimited(). [Dan] Use AER_ severities directly. Don't define CXL_ severities. [Dan] Limit either to Device ID or Agent Info check. [Dan] Validate size of RAS field matches expectations. Changes in v2 -> v1: [Jonathan] Refactor code for trace support. Rename get_cxl_dev() to get_cxl_devstate(). [Jonathan] Cleanups for get_cxl_devstate(). [Alison, Jonathan]: Define array of structures for Device ID and Serial number comparison. [Dave] p_err -> rec/p_rec. [Jonathan] Remove pr_warn. Smita Koralahalli (6): efi/cper, cxl: Prefix protocol error struct and function names with cxl_ efi/cper, cxl: Make definitions and structures global efi/cper, cxl: Remove cper_cxl.h acpi/ghes, cper: Recognize and cache CXL Protocol errors acpi/ghes, cxl/pci: Process CXL CPER Protocol Errors cxl/pci: Add trace logging for CXL PCIe Port RAS errors drivers/acpi/apei/ghes.c | 103 ++++++++++++++++++++++++++++++++ drivers/cxl/core/pci.c | 62 +++++++++++++++++++ drivers/cxl/core/trace.h | 47 +++++++++++++++ drivers/cxl/cxlpci.h | 9 +++ drivers/cxl/pci.c | 59 +++++++++++++++++- drivers/firmware/efi/cper.c | 6 +- drivers/firmware/efi/cper_cxl.c | 39 +----------- drivers/firmware/efi/cper_cxl.h | 66 -------------------- include/cxl/event.h | 101 +++++++++++++++++++++++++++++++ include/linux/cper.h | 8 +++ 10 files changed, 394 insertions(+), 106 deletions(-) delete mode 100644 drivers/firmware/efi/cper_cxl.h -- 2.17.1
