ARM: 7840/1: LPAE: don't reject mapping /dev/mem above 4GB

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With LPAE enabled, physical address space is larger than 4GB. Allow mapping any
part of it via /dev/mem by using PHYS_MASK to determine valid range.

PHYS_MASK covers 40 bits with LPAE enabled and 32 bits otherwise.

Reported-by: Vassili Karpov <av1474@comtv.ru>
Signed-off-by: Sergey Dyasly <dserrg@gmail.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Sergey Dyasly 2013-09-24 16:38:00 +01:00 • committed by Russell King

parent 31d141e3a6

commit 3159f37235

1 changed files with 2 additions and 4 deletions

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arch/arm/mm/mmap.c

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