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 2 patches introduce recognizing and reporting CXL CPER Protocol errors. Should be based on top of: https://lore.kernel.org/linux-cxl/20241211234002.3728674-1-terry.bowman@xxxxxxx Link to v3: https://lore.kernel.org/linux-cxl/20241119003915.174386-1-Smita.KoralahalliChannabasappa@xxxxxxx 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 (5): 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 drivers/acpi/apei/ghes.c | 101 ++++++++++++++++++++++++++++++++ drivers/cxl/core/pci.c | 62 ++++++++++++++++++++ drivers/cxl/cxlpci.h | 9 +++ drivers/cxl/pci.c | 60 ++++++++++++++++++- 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 +++ 9 files changed, 346 insertions(+), 106 deletions(-) delete mode 100644 drivers/firmware/efi/cper_cxl.h -- 2.17.1
