CONFIG_DEV_DAX_CXL: CXL DAX: direct access to CXL RAM regions

General informations

The Linux kernel configuration item CONFIG_DEV_DAX_CXL:

• prompt: CXL DAX: direct access to CXL RAM regions
• type: tristate
• depends on: CONFIG_CXL_BUS && CONFIG_CXL_REGION && CONFIG_DEV_DAX
• defined in drivers/dax/Kconfig
• found in Linux kernels: 6.3–6.12, 6.13-rc+HEAD
• modules built: dax_cxl

Help text

CXL RAM regions are either mapped by platform-firmware and published in the initial system-memory map as "System RAM", mapped by platform-firmware as "Soft Reserved", or dynamically provisioned after boot by the CXL driver. In the latter two cases a device-dax instance is created to access that unmapped-by-default address range. Per usual it can remain as dedicated access via a device interface, or converted to "System RAM" via the dax_kmem facility.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb module dax_cxl CONFIG_DEV_DAX_CXL : drivers/dax/Kconfig : "CXL DAX: direct access to CXL RAM regions" # in 6.3–6.12, 6.13-rc+HEAD

Sources

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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