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Commit | Line | Data |
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ab68f262 DW |
1 | menuconfig DEV_DAX |
2 | tristate "DAX: direct access to differentiated memory" | |
3 | default m if NVDIMM_DAX | |
dee41079 | 4 | depends on TRANSPARENT_HUGEPAGE |
ab68f262 DW |
5 | help |
6 | Support raw access to differentiated (persistence, bandwidth, | |
7 | latency...) memory via an mmap(2) capable character | |
8 | device. Platform firmware or a device driver may identify a | |
9 | platform memory resource that is differentiated from the | |
10 | baseline memory pool. Mappings of a /dev/daxX.Y device impose | |
11 | restrictions that make the mapping behavior deterministic. | |
12 | ||
13 | if DEV_DAX | |
14 | ||
15 | config DEV_DAX_PMEM | |
16 | tristate "PMEM DAX: direct access to persistent memory" | |
867dfe34 | 17 | depends on LIBNVDIMM && NVDIMM_DAX |
ab68f262 DW |
18 | default DEV_DAX |
19 | help | |
20 | Support raw access to persistent memory. Note that this | |
21 | driver consumes memory ranges allocated and exported by the | |
22 | libnvdimm sub-system. | |
23 | ||
24 | Say Y if unsure | |
25 | ||
ba09c01d DW |
26 | config NR_DEV_DAX |
27 | int "Maximum number of Device-DAX instances" | |
28 | default 32768 | |
29 | range 256 2147483647 | |
30 | ||
ab68f262 | 31 | endif |