[RFC V2 PATCH 00/11] CXL: Process event logs

[ira . weiny]

From: Ira Weiny <ira.weiny@xxxxxxxxx>

Changes from RFC v1
	Add event irqs
	General simplification of the code.
	Resolve field alignment questions
	Update to rev 3.0 for comments and structures
	Add reserved fields and output them

Event records inform the OS of various device events.  Events are not needed
for any kernel operation but various user level software will want to track
events.

Add event reporting through the trace event mechanism.  On driver load read and
clear all device events.

Enable all event logs for interrupts and process each log on interrupt.

Testing of this was performed with additions to QEMU posted here:

	https://lore.kernel.org/all/20221010222944.3923556-1-ira.weiny@xxxxxxxxx/

Ira Weiny (11):
  cxl/mbox: Add debug of hardware error code
  cxl/mem: Implement Get Event Records command
  cxl/mem: Implement Clear Event Records command
  cxl/mem: Clear events on driver load
  cxl/mem: Trace General Media Event Record
  cxl/mem: Trace DRAM Event Record
  cxl/mem: Trace Memory Module Event Record
  cxl/test: Add generic mock events
  cxl/test: Add specific events
  cxl/test: Simulate event log overflow
  cxl/mem: Wire up event interrupts

 MAINTAINERS                     |   1 +
 drivers/cxl/core/mbox.c         | 186 ++++++++++++-
 drivers/cxl/cxlmem.h            | 193 +++++++++++++
 drivers/cxl/pci.c               | 154 ++++++++++
 include/trace/events/cxl.h      | 478 ++++++++++++++++++++++++++++++++
 include/uapi/linux/cxl_mem.h    |   4 +
 tools/testing/cxl/test/Kbuild   |   2 +-
 tools/testing/cxl/test/events.c | 329 ++++++++++++++++++++++
 tools/testing/cxl/test/events.h |   9 +
 tools/testing/cxl/test/mem.c    |  34 +++
 10 files changed, 1388 insertions(+), 2 deletions(-)
 create mode 100644 include/trace/events/cxl.h
 create mode 100644 tools/testing/cxl/test/events.c
 create mode 100644 tools/testing/cxl/test/events.h


base-commit: e2302539dd4f1c62d96651c07ddb05aa2461d29c
-- 
2.37.2