mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 15:43:59 +08:00
2080e88aec
In support of allowing device-mapper to compile out idle/dead code when there are no dax providers in the system, introduce the DAX_DRIVER symbol. This is selected by all leaf drivers that device-mapper might be layered on top. This allows device-mapper to conditionally 'select DAX' only when a provider is present. Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Reported-by: Bart Van Assche <Bart.VanAssche@wdc.com> Reviewed-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
35 lines
957 B
Plaintext
35 lines
957 B
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
|
|
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 Y if unsure
|
|
|
|
endif
|