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Diffstat (limited to 'drivers/cxl/Kconfig')
| -rw-r--r-- | drivers/cxl/Kconfig | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/cxl/Kconfig b/drivers/cxl/Kconfig index 768ced3d6fe8..0ac53c422c31 100644 --- a/drivers/cxl/Kconfig +++ b/drivers/cxl/Kconfig @@ -111,4 +111,22 @@ config CXL_REGION select MEMREGION select GET_FREE_REGION +config CXL_REGION_INVALIDATION_TEST + bool "CXL: Region Cache Management Bypass (TEST)" + depends on CXL_REGION + help + CXL Region management and security operations potentially invalidate + the content of CPU caches without notifiying those caches to + invalidate the affected cachelines. The CXL Region driver attempts + to invalidate caches when those events occur. If that invalidation + fails the region will fail to enable. Reasons for cache + invalidation failure are due to the CPU not providing a cache + invalidation mechanism. For example usage of wbinvd is restricted to + bare metal x86. However, for testing purposes toggling this option + can disable that data integrity safety and proceed with enabling + regions when there might be conflicting contents in the CPU cache. + + If unsure, or if this kernel is meant for production environments, + say N. + endif |