arm: KVM: Invalidate BTB on guest exit for Cortex-A12/A17

** Not yet queued for inclusion in mainline **

In order to avoid aliasing attacks against the branch predictor,
let's invalidate the BTB on guest exit. This is made complicated
by the fact that we cannot take a branch before invalidating the
BTB.

We only apply this to A12 and A17, which are the only two ARM
cores on which this useful.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Alex Shi <alex.shi@linaro.org>

Conflicts:
	no hvc stub in hyp_hvc in arch/arm/kvm/hyp/hyp-entry.S

0 files changed, 0 insertions, 0 deletions