[PATCH v3 8/9] cpuidle/powernv: Add support for POWER ISA v3 idle states
Gautham R Shenoy
ego at linux.vnet.ibm.com
Tue May 24 20:37:51 AEST 2016
On Mon, May 23, 2016 at 08:48:41PM +0530, Shreyas B. Prabhu wrote:
> POWER ISA v3 defines a new idle processor core mechanism. In summary,
> a) new instruction named stop is added.
> b) new per thread SPR named PSSCR is added which controls the behavior
> of stop instruction.
> Supported idle states and value to be written to PSSCR register to enter
> any idle state is exposed via ibm,cpu-idle-state-names and
> ibm,cpu-idle-state-psscr respectively. To enter an idle state,
> platform provided power_stop() needs to be invoked with the appropriate
> PSSCR value.
> This patch adds support for this new mechanism in cpuidle powernv driver.
> Cc: Rafael J. Wysocki <rafael.j.wysocki at intel.com>
> Cc: Daniel Lezcano <daniel.lezcano at linaro.org>
> Cc: linux-pm at vger.kernel.org
> Cc: Michael Ellerman <mpe at ellerman.id.au>
> Cc: Paul Mackerras <paulus at ozlabs.org>
> Cc: linuxppc-dev at lists.ozlabs.org
> Signed-off-by: Shreyas B. Prabhu <shreyas at linux.vnet.ibm.com>
Reviewed-by: Gautham R. Shenoy <ego at linux.vnet.ibm.com>
Thanks and Regards
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