libnvdimm, pmem: move pmem to drivers/nvdimm/
Prepare the pmem driver to consume PMEM namespaces emitted by regions of
an nvdimm_bus instance. No functional change.
Acked-by: Christoph Hellwig <hch@lst.de>
Tested-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/nvdimm/Kconfig b/drivers/nvdimm/Kconfig
index 9293355..07a2911 100644
--- a/drivers/nvdimm/Kconfig
+++ b/drivers/nvdimm/Kconfig
@@ -1,4 +1,4 @@
-config LIBNVDIMM
+menuconfig LIBNVDIMM
tristate "NVDIMM (Non-Volatile Memory Device) Support"
depends on PHYS_ADDR_T_64BIT
depends on BLK_DEV
@@ -13,3 +13,24 @@
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