x86/mm: Add support for the non-standard protected e820 type

[deliverable/linux.git] / arch / x86 / Kconfig

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index b7d31ca5518744983c77bc8339f30756621dfea0..9e3bcd6f4a483d0e1d1aeff5eb729edd5b2115e7 100644 (file)
--- 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