Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754775Ab3J2LCV (ORCPT ); Tue, 29 Oct 2013 07:02:21 -0400 Received: from e28smtp02.in.ibm.com ([122.248.162.2]:55222 "EHLO e28smtp02.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754455Ab3J2LCS (ORCPT ); Tue, 29 Oct 2013 07:02:18 -0400 Subject: [PATCH V7 6/7] POWER/cpuidle: Enable powernv cpuidle support. To: benh@kernel.crashing.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org From: Deepthi Dharwar Cc: daniel.lezcano@linaro.org, michael@ellerman.id.au, scottwood@freescale.com, srivatsa.bhat@linux.vnet.ibm.com, preeti@linux.vnet.ibm.com, linux-pm@lists.linux-foundation.org, svaidy@linux.vnet.ibm.com Date: Tue, 29 Oct 2013 16:31:56 +0530 Message-ID: <20131029110154.31547.94129.stgit@deepthi.in.ibm.com> In-Reply-To: <20131029110052.31547.82682.stgit@deepthi.in.ibm.com> References: <20131029110052.31547.82682.stgit@deepthi.in.ibm.com> User-Agent: StGit/0.16 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13102911-5816-0000-0000-00000AA10F06 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2584 Lines: 93 The following patch extends the current power backend idle driver to the powernv platform. Signed-off-by: Deepthi Dharwar --- drivers/cpuidle/cpuidle-ibm-power.c | 39 ++++++++++++++++++++++++++++++++--- 1 file changed, 36 insertions(+), 3 deletions(-) diff --git a/drivers/cpuidle/cpuidle-ibm-power.c b/drivers/cpuidle/cpuidle-ibm-power.c index 5b92242..f790ea2 100644 --- a/drivers/cpuidle/cpuidle-ibm-power.c +++ b/drivers/cpuidle/cpuidle-ibm-power.c @@ -52,9 +52,10 @@ static int snooze_loop(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index) { - unsigned long in_purr; + unsigned long in_purr = 0; - idle_loop_prolog(&in_purr); + if (firmware_has_feature(FW_FEATURE_SPLPAR)) + idle_loop_prolog(&in_purr); local_irq_enable(); set_thread_flag(TIF_POLLING_NRFLAG); @@ -68,7 +69,8 @@ static int snooze_loop(struct cpuidle_device *dev, clear_thread_flag(TIF_POLLING_NRFLAG); smp_mb(); - idle_loop_epilog(in_purr); + if (firmware_has_feature(FW_FEATURE_SPLPAR)) + idle_loop_epilog(in_purr); return index; } @@ -132,6 +134,15 @@ static int shared_cede_loop(struct cpuidle_device *dev, return index; } +static int nap_loop(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + ppc64_runlatch_off(); + power7_idle(); + return index; +} + /* * States for dedicated partition case. */ @@ -165,6 +176,23 @@ static struct cpuidle_state shared_states[] = { .enter = &shared_cede_loop }, }; +static struct cpuidle_state powernv_states[] = { + { /* Snooze */ + .name = "snooze", + .desc = "snooze", + .flags = CPUIDLE_FLAG_TIME_VALID, + .exit_latency = 0, + .target_residency = 0, + .enter = &snooze_loop }, + { /* NAP */ + .name = "NAP", + .desc = "NAP", + .flags = CPUIDLE_FLAG_TIME_VALID, + .exit_latency = 10, + .target_residency = 100, + .enter = &nap_loop }, +}; + void update_smt_snooze_delay(int cpu, int residency) { struct cpuidle_driver *drv = cpuidle_get_driver(); @@ -258,6 +286,11 @@ static int power_idle_probe(void) cpuidle_state_table = dedicated_states; max_idle_state = ARRAY_SIZE(dedicated_states); } + + } else if (firmware_has_feature(FW_FEATURE_OPALv3)) { + cpuidle_state_table = powernv_states; + max_idle_state = ARRAY_SIZE(powernv_states); + } else return -ENODEV; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/