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+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/ndblkX.Y). 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
+ select ND_BTT if BTT
+ 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
+
+config ND_BLK
+ tristate "BLK: Block data window (aperture) device support"
+ default LIBNVDIMM
+ select ND_BTT if BTT
+ help
+ Support NVDIMMs, or other devices, that implement a BLK-mode
+ access capability. BLK-mode access uses memory-mapped-i/o
+ apertures to access persistent media.
+
+ Say Y if your platform firmware emits an ACPI.NFIT table
+ (CONFIG_ACPI_NFIT), or otherwise exposes BLK-mode
+ capabilities.
+
+config ND_BTT
+ tristate
+
+config BTT
+ bool "BTT: Block Translation Table (atomic sector updates)"
+ default y if LIBNVDIMM
+ help
+ The Block Translation Table (BTT) provides atomic sector
+ update semantics for persistent memory devices, so that
+ applications that rely on sector writes not being torn (a
+ guarantee that typical disks provide) can continue to do so.
+ The BTT manifests itself as an alternate personality for an
+ NVDIMM namespace, i.e. a namespace can be in raw mode (pmemX,
+ ndblkX.Y, etc...), or 'sectored' mode, (pmemXs, ndblkX.Ys,
+ etc...).
+
+ Select Y if unsure
+
+endif