Hi Will,
On Thu, Nov 30, 2017 at 5:39 PM, Will Deacon <will.dea...@arm.com> wrote:
> 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.
>
> Signed-off-by: Will Deacon <will.dea...@arm.com>
This is now commit 084eb77cd3a81134 in arm64/for-next/core.
> ---
> arch/arm64/Kconfig | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index fdcc7b9bb15d..3af1657fcac3 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -833,6 +833,19 @@ config FORCE_MAX_ZONEORDER
> However for 4K, we choose a higher default value, 11 as opposed to
> 10, giving us
> 4M allocations matching the default size used by generic code.
>
> +config UNMAP_KERNEL_AT_EL0
> + bool "Unmap kernel when running in userspace (aka \"KAISER\")"
But I believe this is no longer called KAISER?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
