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

2017-06-29 Thread 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

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

2017-06-24 Thread Nicholas Piggin
On Sat, 24 Jun 2017 12:29:01 -0500 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 POWER

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

2017-06-24 Thread Benjamin Herrenschmidt
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 Si