61 lines
1.8 KiB
Plaintext
61 lines
1.8 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
|
|
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
|
|
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_KMEM
|
|
tristate "KMEM DAX: volatile-use of persistent memory"
|
|
default DEV_DAX
|
|
depends on DEV_DAX
|
|
depends on MEMORY_HOTPLUG # for add_memory() and friends
|
|
help
|
|
Support access to persistent memory as if it were RAM. This
|
|
allows easier use of persistent memory by unmodified
|
|
applications.
|
|
|
|
To use this feature, a DAX device must be unbound from the
|
|
device_dax driver (PMEM DAX) and bound to this kmem driver
|
|
on each boot.
|
|
|
|
Say N if unsure.
|
|
|
|
config DEV_DAX_PMEM_COMPAT
|
|
tristate "PMEM DAX: support the deprecated /sys/class/dax interface"
|
|
depends on m && DEV_DAX_PMEM=m
|
|
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
|