[ndctl PATCH 0/6] Add error injection support

[Ben Cheatham <Benjamin.Cheatham@amd.com>]

This series adds support for injecting CXL protocol (CXL.cache/mem)
errors[1] into CXL RCH Downstream ports and VH root ports[2] and
poison into CXL memory devices through the CXL debugfs. Errors are
injected using a new 'inject-error' command, while errors are reported
using a new cxl-list "-N"/"--injectable-errors" option.

The 'inject-error' command and "-N" option of cxl-list both require
access to the CXL driver's debugfs. Because the debugfs doesn't have a
required mount point, a "--debugfs" option is added to both cxl-list and
cxl-inject-error to specify the path to the debugfs if it isn't mounted
to the usual place (/sys/kernel/debug).

The documentation for the new cxl-inject-error command shows both usage
and the possible device/error types, as well as how to retrieve them
using cxl-list. The documentation for cxl-list has also been updated to
show the usage of the new injectable errors and debugfs options.

[1]: ACPI v6.5 spec, section 18.6.4
[2]: ACPI v6.5 spec, table 18.31

Ben Cheatham (6):
  libcxl: Add debugfs path to CXL context
  libcxl: Add CXL protocol errors
  libcxl: Add poison injection functions
  cxl/list: Add debugfs option
  cxl/list: Add injectable-errors option
  cxl: Add inject-error command

 Documentation/cxl/cxl-inject-error.txt | 139 +++++++++++++++
 Documentation/cxl/cxl-list.txt         |  39 ++++-
 Documentation/cxl/meson.build          |   1 +
 cxl/builtin.h                          |   1 +
 cxl/cxl.c                              |   1 +
 cxl/filter.h                           |   3 +
 cxl/inject-error.c                     | 211 +++++++++++++++++++++++
 cxl/json.c                             |  30 ++++
 cxl/lib/libcxl.c                       | 225 +++++++++++++++++++++++++
 cxl/lib/libcxl.sym                     |  13 ++
 cxl/lib/private.h                      |  14 ++
 cxl/libcxl.h                           |  17 ++
 cxl/list.c                             |   9 +
 cxl/meson.build                        |   1 +
 util/json.h                            |   1 +
 15 files changed, 704 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/cxl/cxl-inject-error.txt
 create mode 100644 cxl/inject-error.c

-- 
2.34.1