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Subject[RFC][PATCH v2 01/21] e820: cheat PMEM as DRAM
From: Fan Du <fan.du@intel.com>

This is a hack to enumerate PMEM as NUMA nodes.
It's necessary for current BIOS that don't yet fill ACPI HMAT table.

WARNING: take care to backup. It is mutual exclusive with libnvdimm
subsystem and can destroy ndctl managed namespaces.

Signed-off-by: Fan Du <fan.du@intel.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
---
arch/x86/kernel/e820.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- linux.orig/arch/x86/kernel/e820.c 2018-12-23 19:20:34.587078783 +0800
+++ linux/arch/x86/kernel/e820.c 2018-12-23 19:20:34.587078783 +0800
@@ -403,7 +403,8 @@ static int __init __append_e820_table(st
/* Ignore the entry on 64-bit overflow: */
if (start > end && likely(size))
return -1;
-
+ if (type == E820_TYPE_PMEM)
+ type = E820_TYPE_RAM;
e820__range_add(start, size, type);

entry++;

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