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arm64: Kconfig: Add CONFIG_UNMAP_KERNEL_AT_EL0
authorWill Deacon <will.deacon@arm.com>
Tue, 14 Nov 2017 14:41:01 +0000 (14:41 +0000)
committerWill Deacon <will.deacon@arm.com>
Mon, 11 Dec 2017 13:41:10 +0000 (13:41 +0000)
commit084eb77cd3a81134d02500977dc0ecc9277dc97d
tree8732ef0b6502c51a5b3be805a7f532df2f5abeebtree | snapshot
parentea1e3de85e94d711f63437c04624aa0e8de5c8b3commit | diff
arm64: Kconfig: Add CONFIG_UNMAP_KERNEL_AT_EL0

Add a Kconfig entry to control use of the entry trampoline, which allows
us to unmap the kernel whilst running in userspace and improve the
robustness of KASLR.

Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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