arm64: mm: ignore memory above supported physical address size

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When booting a kernel without 52-bit PA support (e.g. a kernel with 4k
pages) on a system with 52-bit memory, the kernel will currently try to
use the 52-bit memory and crash. Fix this by ignoring any memory higher
than what the kernel supports.

Fixes: f77d281713 ("arm64: enable 52-bit physical address support")
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Kristina Martsenko 2018-01-18 19:13:11 +00:00 • committed by Catalin Marinas

parent 6b88a32c7a

commit e9eaa8052f

1 changed files with 3 additions and 0 deletions

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arch/arm64/mm/init.c

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