@@ -50,9 +50,11 @@ static int snooze_loop(struct cpuidle_device *dev,
struct cpuidle_driver *drv,
int index)
{
- unsigned long in_purr;
+ unsigned long in_purr = 0;
+
+ if (firmware_has_feature(FW_FEATURE_SPLPAR))
+ idle_loop_prolog(&in_purr);
- idle_loop_prolog(&in_purr);
local_irq_enable();
set_thread_flag(TIF_POLLING_NRFLAG);
@@ -66,7 +68,8 @@ 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;
}
@@ -129,6 +132,15 @@ 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.
*/
@@ -162,6 +174,23 @@ static struct cpuidle_state shared_states[MAX_IDLE_STATE_COUNT] = {
.enter = &shared_cede_loop },
};
+static struct cpuidle_state powernv_states[MAX_IDLE_STATE_COUNT] = {
+ { /* 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();
@@ -261,6 +290,8 @@ static int power_idle_probe(void)
cpuidle_state_table = shared_states;
else
cpuidle_state_table = dedicated_states;
+ } else if (firmware_has_feature(FW_FEATURE_OPALv3)) {
+ cpuidle_state_table = powernv_states;
} else
return -ENODEV;
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 | 37 ++++++++++++++++++++++++++++++++--- 1 file changed, 34 insertions(+), 3 deletions(-)