[v8,0/5] CXL, ACPI, APEI, EINJ: Update EINJ for CXL error types

Message

Ben Cheatham Dec. 13, 2023, 10:36 p.m. UTC

v8 Changes:
	- Remove callbacks and use a shared header instead (patch 4) (Dan)
		- Add CONFIG_CXL_EINJ as part of header rework (patch 1) (Dan)
		- Add wrapper __init function for EINJ module (Dan)
	- Move einj_types debugfs file to be directly under debug/cxl (Dan)
	- Move dport directories to be directly under debug/cxl (remove
		portX directories) (Dan)

v7 Changes:
	- Fixed a bug a permissions bug with einj_inject file (was using
	  0x200 instead of 0200)
	- Fixed a kernel test bot error
	- Removed a "magic" number in cxl_einj_available_error_type()
	- Bumped kernel version in debugfs documentation entries
	- Added Jonathan's Reviewed-by

v6 Changes:
	- Reworked to have CXL error types under /sys/kernel/debug/cxl (Dan)
		- Removed CXL error types from legacy EINJ interface in favor of
		new interface
	- Removed cxl_rcrb_addr file
	- Added optional patch for CXL error type #defines (patch 2/5)
	- Changes to documentation updates to match rework
	- Change base to cxl-fixes branch

The new CXL error types will use the Memory Address field in the
SET_ERROR_TYPE_WITH_ADDRESS structure in order to target a CXL 1.1
compliant memory-mapped downstream port. The value of the memory address
will be in the port's MMIO range, and it will not represent physical
(normal or persistent) memory.

Add the functionality for injecting CXL 1.1 errors to the EINJ module,
but not through the EINJ legacy interface under /sys/kernel/debug/apei/einj.
Instead, make the error types available under /sys/kernel/debug/cxl.
This allows for validating the MMIO address for a CXL 1.1 error type
while also not making the user responsible for finding it.

Ben Cheatham (5):
  cxl, ACPI, APEI, EINJ: Add CXL_EINJ Kconfig option
  ACPI, APEI, EINJ: Add wrapper __init function
  ACPI: Add CXL protocol error defines
  cxl/core, EINJ: Add CXL debugfs files and EINJ functions
  EINJ, Documentation: Update EINJ kernel doc

 Documentation/ABI/testing/debugfs-cxl         |  23 +++
 .../firmware-guide/acpi/apei/einj.rst         |  19 ++
 drivers/acpi/apei/Kconfig                     |   1 +
 drivers/acpi/apei/einj.c                      | 169 ++++++++++++++++--
 drivers/cxl/Kconfig                           |  12 ++
 drivers/cxl/core/port.c                       |  33 ++++
 drivers/cxl/einj.h                            |  58 ++++++
 include/acpi/actbl1.h                         |   6 +
 8 files changed, 310 insertions(+), 11 deletions(-)
 create mode 100644 drivers/cxl/einj.h