From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754577AbcEXKiN (ORCPT ); Tue, 24 May 2016 06:38:13 -0400 Received: from e33.co.us.ibm.com ([32.97.110.151]:48404 "EHLO e33.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753066AbcEXKiL (ORCPT ); Tue, 24 May 2016 06:38:11 -0400 X-IBM-Helo: d03dlp01.boulder.ibm.com X-IBM-MailFrom: ego@linux.vnet.ibm.com X-IBM-RcptTo: mpe@ellerman.id.au;rafael.j.wysocki@intel.com;daniel.lezcano@linaro.org;linuxppc-dev@lists.ozlabs.org;mikey@neuling.org;paulus@ozlabs.org;linux-kernel@vger.kernel.org;linux-pm@vger.kernel.org Date: Tue, 24 May 2016 16:07:51 +0530 From: Gautham R Shenoy To: "Shreyas B. Prabhu" Cc: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, paulus@ozlabs.org, linux-kernel@vger.kernel.org, mikey@neuling.org, ego@linux.vnet.ibm.com, "Rafael J. Wysocki" , Daniel Lezcano , linux-pm@vger.kernel.org Subject: Re: [PATCH v3 8/9] cpuidle/powernv: Add support for POWER ISA v3 idle states Message-ID: <20160524103751.GF12860@in.ibm.com> Reply-To: ego@linux.vnet.ibm.com References: <1464016722-7488-1-git-send-email-shreyas@linux.vnet.ibm.com> <1464016722-7488-9-git-send-email-shreyas@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1464016722-7488-9-git-send-email-shreyas@linux.vnet.ibm.com> User-Agent: Mutt/1.5.23 (2014-03-12) X-TM-AS-GCONF: 00 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16052410-0009-0000-0000-000037A79794 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 > Cc: Daniel Lezcano > Cc: linux-pm@vger.kernel.org > Cc: Michael Ellerman > Cc: Paul Mackerras > Cc: linuxppc-dev@lists.ozlabs.org > Signed-off-by: Shreyas B. Prabhu Reviewed-by: Gautham R. Shenoy -- Thanks and Regards gautham.