diff options
Diffstat (limited to 'drivers/cpuidle/cpuidle-pseries.c')
| -rw-r--r-- | drivers/cpuidle/cpuidle-pseries.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/cpuidle/cpuidle-pseries.c b/drivers/cpuidle/cpuidle-pseries.c index 3e058ad2bb51..31c8e51162b2 100644 --- a/drivers/cpuidle/cpuidle-pseries.c +++ b/drivers/cpuidle/cpuidle-pseries.c @@ -86,19 +86,27 @@ static void check_and_cede_processor(void) } } +#define NR_DEDICATED_STATES 2 /* snooze, CEDE */ + +static u8 cede_latency_hint[NR_DEDICATED_STATES]; + static int dedicated_cede_loop(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index) { + u8 old_latency_hint; pseries_idle_prolog(); get_lppaca()->donate_dedicated_cpu = 1; + old_latency_hint = get_lppaca()->cede_latency_hint; + get_lppaca()->cede_latency_hint = cede_latency_hint[index]; HMT_medium(); check_and_cede_processor(); local_irq_disable(); get_lppaca()->donate_dedicated_cpu = 0; + get_lppaca()->cede_latency_hint = old_latency_hint; pseries_idle_epilog(); @@ -130,7 +138,7 @@ static int shared_cede_loop(struct cpuidle_device *dev, /* * States for dedicated partition case. */ -static struct cpuidle_state dedicated_states[] = { +static struct cpuidle_state dedicated_states[NR_DEDICATED_STATES] = { { /* Snooze */ .name = "snooze", .desc = "snooze", @@ -233,7 +241,7 @@ static int pseries_idle_probe(void) max_idle_state = ARRAY_SIZE(shared_states); } else { cpuidle_state_table = dedicated_states; - max_idle_state = ARRAY_SIZE(dedicated_states); + max_idle_state = NR_DEDICATED_STATES; } } else return -ENODEV; |