From: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
To: benh@kernel.crashing.org, linuxppc-dev@lists.ozlabs.org,
linux-kernel@vger.kernel.org
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
Subject: [PATCH V7 6/7] POWER/cpuidle: Enable powernv cpuidle support.
Date: Tue, 29 Oct 2013 16:31:56 +0530 [thread overview]
Message-ID: <20131029110154.31547.94129.stgit@deepthi.in.ibm.com> (raw)
In-Reply-To: <20131029110052.31547.82682.stgit@deepthi.in.ibm.com>
The following patch extends the current power backend
idle driver to the powernv platform.
Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
---
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;
next prev parent reply other threads:[~2013-10-29 11:02 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-29 11:01 [PATCH V7 0/7] POWER/cpuidle: Generic IBM-POWER cpuidle driver enabled for PSERIES and POWERNV platforms Deepthi Dharwar
2013-10-29 11:01 ` [PATCH V7 1/7] pseries/cpuidle: Move processor_idle.c to drivers/cpuidle Deepthi Dharwar
2013-11-06 20:58 ` Daniel Lezcano
2013-10-29 11:01 ` [PATCH V7 2/7] pseries/cpuidle: Use cpuidle_register() for initialisation Deepthi Dharwar
2013-11-06 21:00 ` Daniel Lezcano
2013-10-29 11:01 ` [PATCH V7 3/7] pseries/cpuidle: Make pseries_idle backend driver a non-module Deepthi Dharwar
2013-11-06 21:01 ` Daniel Lezcano
2013-10-29 11:01 ` [PATCH V7 4/7] pseries/cpuidle: Remove MAX_IDLE_STATE macro Deepthi Dharwar
2013-11-06 21:02 ` Daniel Lezcano
2013-10-29 11:01 ` [PATCH V7 5/7] POWER/cpuidle: Generic POWER CPUIDLE driver supporting PSERIES Deepthi Dharwar
2013-11-06 21:05 ` Daniel Lezcano
2013-11-07 4:15 ` Deepthi Dharwar
2013-11-07 5:01 ` Benjamin Herrenschmidt
2013-11-07 5:27 ` Deepthi Dharwar
2013-10-29 11:01 ` Deepthi Dharwar [this message]
2013-11-06 21:06 ` [PATCH V7 6/7] POWER/cpuidle: Enable powernv cpuidle support Daniel Lezcano
2013-10-29 11:02 ` [PATCH V7 7/7] powernv/cpuidle: Enable idle powernv cpu to call into the cpuidle framework Deepthi Dharwar
2013-11-06 21:11 ` Daniel Lezcano
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