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Diffstat (limited to 'drivers/dax/Kconfig')
| -rw-r--r-- | drivers/dax/Kconfig | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/dax/Kconfig b/drivers/dax/Kconfig index 1163eb62e5f6..bd06e16c7ac8 100644 --- a/drivers/dax/Kconfig +++ b/drivers/dax/Kconfig @@ -45,6 +45,19 @@ config DEV_DAX_HMEM Say M if unsure. +config DEV_DAX_CXL + tristate "CXL DAX: direct access to CXL RAM regions" + depends on CXL_REGION && DEV_DAX + default CXL_REGION && DEV_DAX + help + 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. + config DEV_DAX_HMEM_DEVICES depends on DEV_DAX_HMEM && DAX def_bool y |