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powerpc/32: prepare shadow area for KASAN

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This patch prepares a shadow area for KASAN.

The shadow area will be at the top of the kernel virtual
memory space above the fixmap area and will occupy one
eighth of the total kernel virtual memory space.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy
2019-04-26 16:23:32 +00:00
committed by Michael Ellerman
parent a67beca077
commit b4abe38fd6
5 changed files with 38 additions and 0 deletions
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arch/powerpc/Kconfig.debug
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@@ -366,3 +366,8 @@ config PPC_FAST_ENDIAN_SWITCH
depends on DEBUG_KERNEL && PPC_BOOK3S_64
help
If you're unsure what this is, say N.
config KASAN_SHADOW_OFFSET
hex
depends on KASAN
default 0xe0000000