tree 891d518c9bf410c4cda3a09d49c1eb797f75279d
parent 19c9a115085edc6e2f1ee8e7c30600ba2fa932f4
author Marc Zyngier <marc.zyngier@arm.com> 1496772513 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1497445556 +0200

arm64: KVM: Preserve RES1 bits in SCTLR_EL2

commit d68c1f7fd1b7148dab5fe658321d511998969f2d upstream.

__do_hyp_init has the rather bad habit of ignoring RES1 bits and
writing them back as zero. On a v8.0-8.2 CPU, this doesn't do anything
bad, but may end-up being pretty nasty on future revisions of the
architecture.

Let's preserve those bits so that we don't have to fix this later on.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>