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x86, kexec, 64bit: Only set ident mapping for ram.

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We should set mappings only for usable memory ranges under max_pfn
Otherwise causes same problem that is fixed by

	x86, mm: Only direct map addresses that are marked as E820_RAM

This patch exposes pfn_mapped array, and only sets ident mapping for ranges
in that array.

This patch relies on new kernel_ident_mapping_init that could handle existing
pgd/pud between different calls.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1359058816-7615-25-git-send-email-yinghai@kernel.org
Cc: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Yinghai Lu
2013-01-24 12:20:05 -08:00
committed by H. Peter Anvin
parent 9ebdc79f7a
commit 0e691cf824
3 changed files with 15 additions and 6 deletions
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4
arch/x86/mm/init.c
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@@ -302,8 +302,8 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
return nr_range;
}
static struct range pfn_mapped[E820_X_MAX];
static int nr_pfn_mapped;
struct range pfn_mapped[E820_X_MAX];
int nr_pfn_mapped;
static void add_pfn_range_mapped(unsigned long start_pfn, unsigned long end_pfn)
{