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| author | Christoph Hellwig | 2015-04-01 09:12:18 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2015-04-01 17:02:43 +0200 |
| commit | ec776ef6bbe1734c29cd6bd05219cd93b2731bd4 (patch) | |
| tree | 4505347045c199c3d8923e224ecbed1ffafe1949 /arch/x86/Kconfig | |
| parent | Linux 4.0-rc6 (diff) | |
| download | kernel-qcow2-linux-ec776ef6bbe1734c29cd6bd05219cd93b2731bd4.tar.gz kernel-qcow2-linux-ec776ef6bbe1734c29cd6bd05219cd93b2731bd4.tar.xz kernel-qcow2-linux-ec776ef6bbe1734c29cd6bd05219cd93b2731bd4.zip | |
x86/mm: Add support for the non-standard protected e820 type
Various recent BIOSes support NVDIMMs or ADR using a
non-standard e820 memory type, and Intel supplied reference
Linux code using this type to various vendors.
Wire this e820 table type up to export platform devices for the
pmem driver so that we can use it in Linux.
Based on earlier work from:
Dave Jiang <dave.jiang@intel.com>
Dan Williams <dan.j.williams@intel.com>
Includes fixes for NUMA regions from Boaz Harrosh.
Tested-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Boaz Harrosh <boaz@plexistor.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-nvdimm@ml01.01.org
Link: http://lkml.kernel.org/r/1427872339-6688-2-git-send-email-hch@lst.de
[ Minor cleanups. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index b7d31ca55187..9e3bcd6f4a48 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1430,6 +1430,16 @@ config ILLEGAL_POINTER_VALUE source "mm/Kconfig" +config X86_PMEM_LEGACY + bool "Support non-standard NVDIMMs and ADR protected memory" + 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. + The kernel will offer these regions to the 'pmem' driver so + they can be used for persistent storage. + + Say Y if unsure. + config HIGHPTE bool "Allocate 3rd-level pagetables from highmem" depends on HIGHMEM |