6 tristate "DAX: direct access to differentiated memory"
8 default m if NVDIMM_DAX
13 tristate "Device DAX: direct access mapping device"
14 depends on TRANSPARENT_HUGEPAGE
16 Support raw access to differentiated (persistence, bandwidth,
17 latency...) memory via an mmap(2) capable character
18 device. Platform firmware or a device driver may identify a
19 platform memory resource that is differentiated from the
20 baseline memory pool. Mappings of a /dev/daxX.Y device impose
21 restrictions that make the mapping behavior deterministic.
24 tristate "PMEM DAX: direct access to persistent memory"
25 depends on LIBNVDIMM && NVDIMM_DAX && DEV_DAX
28 Support raw access to persistent memory. Note that this
29 driver consumes memory ranges allocated and exported by the
35 tristate "KMEM DAX: volatile-use of persistent memory"
38 depends on MEMORY_HOTPLUG # for add_memory() and friends
40 Support access to persistent memory as if it were RAM. This
41 allows easier use of persistent memory by unmodified
44 To use this feature, a DAX device must be unbound from the
45 device_dax driver (PMEM DAX) and bound to this kmem driver
50 config DEV_DAX_PMEM_COMPAT
51 tristate "PMEM DAX: support the deprecated /sys/class/dax interface"
52 depends on m && DEV_DAX_PMEM=m
55 Older versions of the libdaxctl library expect to find all
56 device-dax instances under /sys/class/dax. If libdaxctl in
57 your distribution is older than v58 say M, otherwise say N.