CONFIG_CXL_REGION_INVALIDATION_TEST: CXL: Region Cache Management Bypass (TEST)

General informations

The Linux kernel configuration item CONFIG_CXL_REGION_INVALIDATION_TEST:

• prompt: CXL: Region Cache Management Bypass (TEST)
• type: bool
• depends on: CONFIG_CXL_REGION
• defined in drivers/cxl/Kconfig
• found in Linux kernels: 6.2–6.11, 6.12-rc+HEAD

Help text

CXL Region management and security operations potentially invalidate the content of CPU caches without notifying 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.

Hardware

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This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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