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(parent: 31c3a1e) | patch
powerpc/64s: Enable barrier_nospec based on firmware settings
authorMichal Suchanek <msuchanek@suse.de>
Fri, 29 Mar 2019 11:25:51 +0000 (22:25 +1100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 3 Apr 2019 04:25:12 +0000 (06:25 +0200)
commitae082ed4702e31ed833b7b40b1afe4ce11adb6b4
treebe40b55cc4d0464e76c24261abd94599d110de36tree | snapshot
parent31c3a1e81171f03c7df48aac3efc1d417a18c708commit | diff
powerpc/64s: Enable barrier_nospec based on firmware settings

commit cb3d6759a93c6d0aea1c10deb6d00e111c29c19c upstream.

Check what firmware told us and enable/disable the barrier_nospec as
appropriate.

We err on the side of enabling the barrier, as it's no-op on older
systems, see the comment for more detail.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/powerpc/include/asm/setup.h diff | blob | blame | history
arch/powerpc/kernel/security.c diff | blob | blame | history
arch/powerpc/platforms/powernv/setup.c diff | blob | blame | history
arch/powerpc/platforms/pseries/setup.c diff | blob | blame | history
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git