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BACKPORT: arm64: only consider memblocks with NOMAP cleared for linear mapping

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Take the new memblock attribute MEMBLOCK_NOMAP into account when
deciding whether a certain region is or should be covered by the
kernel direct mapping.

Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>

Change-Id: Id7346a09bb3aee5e9a5ef8812251f80cf8265532
(cherry picked from commit 68709f4538)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
This commit is contained in:
Ard Biesheuvel
2015-11-30 13:28:16 +01:00
committed by Sami Tolvanen
parent bb849676d5
commit b6535fe666
2 changed files with 3 additions and 1 deletions
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2
arch/arm64/mm/init.c
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@@ -131,7 +131,7 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max)
int pfn_valid(unsigned long pfn)
{
return (pfn & PFN_MASK) == pfn && memblock_is_memory(pfn << PAGE_SHIFT);
return (pfn & PFN_MASK) == pfn && memblock_is_map_memory(pfn << PAGE_SHIFT);
}
EXPORT_SYMBOL(pfn_valid);
#endif

2
arch/arm64/mm/mmu.c
View File

@@ -438,6 +438,8 @@ static void __init map_mem(pgd_t *pgd)
if (start >= end)
break;
if (memblock_is_nomap(reg))
continue;
__map_memblock(pgd, start, end);
}