arm64: Kconfig: Add CONFIG_UNMAP_KERNEL_AT_EL0

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Commit 084eb77cd3 upstream.

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>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Will Deacon 2017-11-14 14:41:01 +00:00 • committed by Greg Kroah-Hartman

parent 68a65ce703

commit 332e028820

1 changed files with 13 additions and 0 deletions

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