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authorDan Williams <dan.j.williams@intel.com>2015-06-09 15:33:45 -0400
committerDan Williams <dan.j.williams@intel.com>2015-06-24 21:24:10 -0400
commit9f53f9fa4ad1d8bddd4d14359cdabc531aedffe8 (patch)
treeaa2a412de2b39b8b042e5cd9ae5a223b79ff8640 /arch/x86/Kconfig
parent18da2c9ee41a036bf470dbad73c18a815725d36e (diff)
downloadlwn-9f53f9fa4ad1d8bddd4d14359cdabc531aedffe8.tar.gz
lwn-9f53f9fa4ad1d8bddd4d14359cdabc531aedffe8.zip
libnvdimm, pmem: add libnvdimm support to the pmem driver
nd_pmem attaches to persistent memory regions and namespaces emitted by the libnvdimm subsystem, and, same as the original pmem driver, presents the system-physical-address range as a block device. The existing e820-type-12 to pmem setup is converted to an nvdimm_bus that emits an nd_namespace_io device. Note that the X in 'pmemX' is now derived from the parent region. This provides some stability to the pmem devices names from boot-to-boot. The minor numbers are also more predictable by passing 0 to alloc_disk(). Cc: Andy Lutomirski <luto@amacapital.net> Cc: Boaz Harrosh <boaz@plexistor.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jens Axboe <axboe@fb.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> 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>
Diffstat (limited to 'arch/x86/Kconfig')
-rw-r--r--arch/x86/Kconfig3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 226d5696e1d1..1a2cbf641667 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1424,6 +1424,9 @@ source "mm/Kconfig"
config X86_PMEM_LEGACY
bool "Support non-standard NVDIMMs and ADR protected memory"
+ depends on PHYS_ADDR_T_64BIT
+ depends on BLK_DEV
+ select LIBNVDIMM
help
Treat memory marked using the non-standard e820 type of 12 as used
by the Intel Sandy Bridge-EP reference BIOS as protected memory.