On Mon, 12 Jun 2017 14:23:16 +0530 Gautham R Shenoy <e...@linux.vnet.ibm.com> wrote:
> Hi Nick, > > On Mon, Jun 12, 2017 at 09:58:24AM +1000, Nicholas Piggin wrote: > > Before the cpuidle driver is enabled, provide a default idle > > function similarly to POWER7/8. > > > > This should not have much effect, because the cpuidle driver > > for powernv is mandatory, but if that changes we should have > > a fallback. > > > > Signed-off-by: Nicholas Piggin <npig...@gmail.com> > > --- > > arch/powerpc/platforms/powernv/idle.c | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/arch/powerpc/platforms/powernv/idle.c > > b/arch/powerpc/platforms/powernv/idle.c > > index f188d84d9c59..e327e1585ddc 100644 > > --- a/arch/powerpc/platforms/powernv/idle.c > > +++ b/arch/powerpc/platforms/powernv/idle.c > > @@ -677,6 +677,8 @@ static int __init pnv_init_idle_states(void) > > > > if (supported_cpuidle_states & OPAL_PM_NAP_ENABLED) > > ppc_md.power_save = power7_idle; > > + else if (supported_cpuidle_states & OPAL_PM_STOP_INST_FAST) > > + ppc_md.power_save = power9_idle; > > We are already initializing this in pnv_power9_idle_init() depending > on whether the device tree has exposed at least one INST_FAST idle > state. Else this should be NULL, because the firmware doesn't want us > to use a platform idle state! Ah I missed that, thanks. Will drop this one. Thanks, Nick
