Re: [PATCH 3/3] powernv:idle: Set LPCR_UPRT on wakeup from deep-stop

2017-04-13 Thread Nicholas Piggin
On Thu, 13 Apr 2017 17:24:34 +0530 Gautham R Shenoy wrote: > On Thu, Apr 13, 2017 at 05:18:17PM +1000, Nicholas Piggin wrote: > > On Thu, 13 Apr 2017 16:27:34 +1000 > > Michael Neuling wrote: > > > > > On Thu, 2017-04-13 at 14:12 +1000, Benjamin Herrenschmidt wrote: > > > > On Thu, 2017-04-

Re: [PATCH 3/3] powernv:idle: Set LPCR_UPRT on wakeup from deep-stop

2017-04-13 Thread Gautham R Shenoy
On Thu, Apr 13, 2017 at 05:18:17PM +1000, Nicholas Piggin wrote: > On Thu, 13 Apr 2017 16:27:34 +1000 > Michael Neuling wrote: > > > On Thu, 2017-04-13 at 14:12 +1000, Benjamin Herrenschmidt wrote: > > > On Thu, 2017-04-13 at 09:28 +0530, Aneesh Kumar K.V wrote: > > > > >   #endif > > > > >    

Re: [PATCH 3/3] powernv:idle: Set LPCR_UPRT on wakeup from deep-stop

2017-04-13 Thread Michael Ellerman
Nicholas Piggin writes: > On Thu, 13 Apr 2017 16:27:34 +1000 > Michael Neuling wrote: > >> On Thu, 2017-04-13 at 14:12 +1000, Benjamin Herrenschmidt wrote: >> > On Thu, 2017-04-13 at 09:28 +0530, Aneesh Kumar K.V wrote: >> > > >   #endif >> > > >    mtctr   r12 >> > > >    bctrl >> > >

Re: [PATCH 3/3] powernv:idle: Set LPCR_UPRT on wakeup from deep-stop

2017-04-13 Thread Nicholas Piggin
On Thu, 13 Apr 2017 16:27:34 +1000 Michael Neuling wrote: > On Thu, 2017-04-13 at 14:12 +1000, Benjamin Herrenschmidt wrote: > > On Thu, 2017-04-13 at 09:28 +0530, Aneesh Kumar K.V wrote: > > > >   #endif > > > >    mtctr   r12 > > > >    bctrl > > > > +/* > > > > + * cur_cpu_spec->cpu_

Re: [PATCH 3/3] powernv:idle: Set LPCR_UPRT on wakeup from deep-stop

2017-04-12 Thread Michael Neuling
On Thu, 2017-04-13 at 14:12 +1000, Benjamin Herrenschmidt wrote: > On Thu, 2017-04-13 at 09:28 +0530, Aneesh Kumar K.V wrote: > > >   #endif > > >    mtctr   r12 > > >    bctrl > > > +/* > > > + * cur_cpu_spec->cpu_restore would restore LPCR to a > > > + * sane value that is set at early bo

Re: [PATCH 3/3] powernv:idle: Set LPCR_UPRT on wakeup from deep-stop

2017-04-12 Thread Benjamin Herrenschmidt
On Thu, 2017-04-13 at 09:28 +0530, Aneesh Kumar K.V wrote: > >   #endif > >    mtctr   r12 > >    bctrl > > +/* > > + * cur_cpu_spec->cpu_restore would restore LPCR to a > > + * sane value that is set at early boot time, > > + * thereby clearing LPCR_UPRT. > > + * LPCR_UPRT is required if w

Re: [PATCH 3/3] powernv:idle: Set LPCR_UPRT on wakeup from deep-stop

2017-04-12 Thread Aneesh Kumar K.V
"Gautham R. Shenoy" writes: > From: "Gautham R. Shenoy" > > On wakeup from a deep-stop used for CPU-Hotplug, we invoke > cur_cpu_spec->cpu_restore() which would set sane default values to > various SPRs including LPCR. > > On POWER9, the cpu_restore_power9() call would would restore LPCR to a >