arm64: Kconfig: Reword UNMAP_KERNEL_AT_EL0 kconfig entry

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Commit 0617052ddd upstream.

Although CONFIG_UNMAP_KERNEL_AT_EL0 does make KASLR more robust, it's
actually more useful as a mitigation against speculation attacks that
can leak arbitrary kernel data to userspace through speculation.

Reword the Kconfig help message to reflect this, and make the option
depend on EXPERT so that it is on by default for the majority of users.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Will Deacon 2017-11-14 16:19:39 +00:00 • committed by Greg Kroah-Hartman

parent 8c17f83625

commit 14a756c2fd

1 changed files with 6 additions and 7 deletions

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