cxl: Disable HPA/SPA translation handlers for Normalized Addressing

cxl: Disable HPA/SPA translation handlers for Normalized Addressing

The root decoder provides the callbacks hpa_to_spa and spa_to_hpa to
perform Host Physical Address (HPA) and System Physical Address
translations, respectively. The callbacks are required to convert
addresses when HPA != SPA. XOR interleaving depends on this mechanism,
and the necessary handlers are implemented.

The translation handlers are used for poison injection
(trace_cxl_poison, cxl_poison_inject_fops) and error handling
(cxl_event_trace_record).

In AMD Zen5 systems with Normalized Addressing, endpoint addresses are
not SPAs, and translation handlers are required for these features to
function correctly.

Now, as ACPI PRM translation could be expensive in tracing or error
handling code paths, do not yet enable translations to avoid its
intensive use. Instead, disable those features which are used only for
debugging and enhanced logging.

Introduce the flag CXL_REGION_F_NORMALIZED_ADDRESSING that indicates
Normalized Addressing for a region and use it to disable poison injection
and DPA to HPA conversion.

Note: Dropped unused CXL_DECODER_F_MASK macro.

[dj: Fix commit log CXL_REGION_F_NORM_ADDR to
 CXL_REGION_F_NORMALIZED_ADDRESSING ]

Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Signed-off-by: Robert Richter <rrichter@amd.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://patch.msgid.link/20260114164837.1076338-14-rrichter@amd.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>