[v2] powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Michael Ellerman]

On Sat, 2017-06-24 at 17:29:01 UTC, Benjamin Herrenschmidt wrote:
> On POWER9 the ERAT may be incorrect on wakeup from some stop states
> that lose state. This causes random segvs and illegal instructions
> when these stop states are enabled.
> 
> This patch invalidates the ERAT on wakeup on POWER9 to prevent this
> from causing a problem.
> 
> Signed-off-by: Michael Neuling <mikey at neuling.org>
> Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
> Reviewed-by: Nicholas Piggin <npiggin at gmail.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/ba6d334ac230065243a92bb7cb3fd6

cheers