730926c3b0
On the expectation that some environments may not upgrade libdaxctl (userspace component that depends on the /sys/class/dax hierarchy), provide a default / legacy dax_pmem_compat driver. The dax_pmem_compat driver implements the original /sys/class/dax sysfs layout rather than /sys/bus/dax. When userspace is upgraded it can blacklist this module and switch to the dax_pmem driver going forward. CONFIG_DEV_DAX_PMEM_COMPAT and supporting code will be deleted according to the dax_pmem entry in Documentation/ABI/obsolete/. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
45 lines
1.3 KiB
Plaintext
45 lines
1.3 KiB
Plaintext
config DAX_DRIVER
|
|
select DAX
|
|
bool
|
|
|
|
menuconfig DAX
|
|
tristate "DAX: direct access to differentiated memory"
|
|
select SRCU
|
|
default m if NVDIMM_DAX
|
|
|
|
if DAX
|
|
|
|
config DEV_DAX
|
|
tristate "Device DAX: direct access mapping device"
|
|
depends on TRANSPARENT_HUGEPAGE
|
|
help
|
|
Support raw access to differentiated (persistence, bandwidth,
|
|
latency...) memory via an mmap(2) capable character
|
|
device. Platform firmware or a device driver may identify a
|
|
platform memory resource that is differentiated from the
|
|
baseline memory pool. Mappings of a /dev/daxX.Y device impose
|
|
restrictions that make the mapping behavior deterministic.
|
|
|
|
config DEV_DAX_PMEM
|
|
tristate "PMEM DAX: direct access to persistent memory"
|
|
depends on LIBNVDIMM && NVDIMM_DAX && DEV_DAX
|
|
depends on m # until we can kill DEV_DAX_PMEM_COMPAT
|
|
default DEV_DAX
|
|
help
|
|
Support raw access to persistent memory. Note that this
|
|
driver consumes memory ranges allocated and exported by the
|
|
libnvdimm sub-system.
|
|
|
|
Say M if unsure
|
|
|
|
config DEV_DAX_PMEM_COMPAT
|
|
tristate "PMEM DAX: support the deprecated /sys/class/dax interface"
|
|
depends on DEV_DAX_PMEM
|
|
default DEV_DAX_PMEM
|
|
help
|
|
Older versions of the libdaxctl library expect to find all
|
|
device-dax instances under /sys/class/dax. If libdaxctl in
|
|
your distribution is older than v58 say M, otherwise say N.
|
|
|
|
endif
|