[PATCH v2 0/4] Add DPA->HPA translation to dram & general_media

[alison.schofield@intel.com]

From: Alison Schofield <alison.schofield@intel.com>

Changes in v2:
- Fix !CONFIG_CXL_REGION build error in cxl/core.h stub (lkp@intel.com)
- Remove 'to dpa' usage when DPA is already adjusted in TP_fast_assign
- Use a common macro for extracting dpa from event record (Ira)
- Return "" instead of NULL for region name in stub (Jonathan)
- Replace store_region_info MACRO w static inline func (Dan)
- Set uuid to uuid_null when no region info available (Ira)
- Remove useless macro wrapping cxl_to_region_name() (Ira)
- Remove extraneous diff in Patch 4's TP_printk (Jonathan)
- Update commit msg patch 1 & 2, s/stubs/stub (Jonathan)
Link to v1: https://lore.kernel.org/cover.1711598777.git.alison.schofield@intel.com/

An update to the cxl_events unit test is in review here:
https://lore.kernel.org/20240328043727.2186722-1-alison.schofield@intel.com/


Begin Cover Letter:
Add HPA translations to CXL events: cxl_dram and cxl_general_media

Patches 1 & 2:
Before adding the new support, do some housekeeping and move related
helpers to the region driver because there is no looking up region
related info without CONFIG_CXL_REGION.

Patch 3:
The new functionality is introduced - cxl_dram & cxl_general_media
events will lookup and log the DPA->HPA translation along with the
region name and region uuid.

Patch 4:
Apply the new lookup helpers to the existing cxl_poison event, so it
can be the same, share in the new goodness, and also tidy up its
implementation.

An update to the cxl_event unit test is posted separately.

Alison Schofield (4):
  cxl/region: Move cxl_dpa_to_region() work to the region driver
  cxl/region: Move cxl_trace_hpa() work to the region driver
  cxl/core: Add region info to cxl_general_media and cxl_dram events
  cxl/core: Remove cxlr dependency from cxl_poison trace events

 drivers/cxl/core/core.h   |  20 +++++
 drivers/cxl/core/mbox.c   |  22 ++++--
 drivers/cxl/core/memdev.c |  52 +------------
 drivers/cxl/core/region.c | 151 +++++++++++++++++++++++++++++++++++++-
 drivers/cxl/core/trace.c  |  91 -----------------------
 drivers/cxl/core/trace.h  |  81 ++++++++++++++------
 drivers/cxl/cxlmem.h      |   3 +-
 7 files changed, 245 insertions(+), 175 deletions(-)


base-commit: 4cece764965020c22cff7665b18a012006359095
-- 
2.37.3