| menuconfig LIBNVDIMM |
| tristate "NVDIMM (Non-Volatile Memory Device) Support" |
| depends on PHYS_ADDR_T_64BIT |
| depends on BLK_DEV |
| help |
| Generic support for non-volatile memory devices including |
| ACPI-6-NFIT defined resources. On platforms that define an |
| NFIT, or otherwise can discover NVDIMM resources, a libnvdimm |
| bus is registered to advertise PMEM (persistent memory) |
| namespaces (/dev/pmemX) and BLK (sliding mmio window(s)) |
| namespaces (/dev/ndX). A PMEM namespace refers to a memory |
| resource that may span multiple DIMMs and support DAX (see |
| CONFIG_DAX). A BLK namespace refers to an NVDIMM control |
| region which exposes an mmio register set for windowed |
| access mode to non-volatile memory. |
| |
| if LIBNVDIMM |
| |
| config BLK_DEV_PMEM |
| tristate "PMEM: Persistent memory block device support" |
| default LIBNVDIMM |
| depends on HAS_IOMEM |
| help |
| Memory ranges for PMEM are described by either an NFIT |
| (NVDIMM Firmware Interface Table, see CONFIG_NFIT_ACPI), a |
| non-standard OEM-specific E820 memory type (type-12, see |
| CONFIG_X86_PMEM_LEGACY), or it is manually specified by the |
| 'memmap=nn[KMG]!ss[KMG]' kernel command line (see |
| Documentation/kernel-parameters.txt). This driver converts |
| these persistent memory ranges into block devices that are |
| capable of DAX (direct-access) file system mappings. See |
| Documentation/nvdimm/nvdimm.txt for more details. |
| |
| Say Y if you want to use an NVDIMM |
| |
| endif |