diff options
Diffstat (limited to 'arch')
-rw-r--r-- | arch/powerpc/include/asm/processor.h | 2 | ||||
-rw-r--r-- | arch/powerpc/platforms/pseries/processor_idle.c | 25 | ||||
-rw-r--r-- | arch/powerpc/platforms/pseries/smp.c | 1 |
3 files changed, 19 insertions, 9 deletions
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index 413a5eaef56c..53b6dfa83344 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h | |||
@@ -389,10 +389,8 @@ extern int powersave_nap; /* set if nap mode can be used in idle loop */ | |||
389 | 389 | ||
390 | #ifdef CONFIG_PSERIES_IDLE | 390 | #ifdef CONFIG_PSERIES_IDLE |
391 | extern void update_smt_snooze_delay(int snooze); | 391 | extern void update_smt_snooze_delay(int snooze); |
392 | extern int pseries_notify_cpuidle_add_cpu(int cpu); | ||
393 | #else | 392 | #else |
394 | static inline void update_smt_snooze_delay(int snooze) {} | 393 | static inline void update_smt_snooze_delay(int snooze) {} |
395 | static inline int pseries_notify_cpuidle_add_cpu(int cpu) { return 0; } | ||
396 | #endif | 394 | #endif |
397 | 395 | ||
398 | extern void flush_instruction_cache(void); | 396 | extern void flush_instruction_cache(void); |
diff --git a/arch/powerpc/platforms/pseries/processor_idle.c b/arch/powerpc/platforms/pseries/processor_idle.c index e61483e8e960..a97ef6692dad 100644 --- a/arch/powerpc/platforms/pseries/processor_idle.c +++ b/arch/powerpc/platforms/pseries/processor_idle.c | |||
@@ -11,6 +11,7 @@ | |||
11 | #include <linux/moduleparam.h> | 11 | #include <linux/moduleparam.h> |
12 | #include <linux/cpuidle.h> | 12 | #include <linux/cpuidle.h> |
13 | #include <linux/cpu.h> | 13 | #include <linux/cpu.h> |
14 | #include <linux/notifier.h> | ||
14 | 15 | ||
15 | #include <asm/paca.h> | 16 | #include <asm/paca.h> |
16 | #include <asm/reg.h> | 17 | #include <asm/reg.h> |
@@ -186,17 +187,28 @@ static struct cpuidle_state shared_states[MAX_IDLE_STATE_COUNT] = { | |||
186 | .enter = &shared_cede_loop }, | 187 | .enter = &shared_cede_loop }, |
187 | }; | 188 | }; |
188 | 189 | ||
189 | int pseries_notify_cpuidle_add_cpu(int cpu) | 190 | static int pseries_cpuidle_add_cpu_notifier(struct notifier_block *n, |
191 | unsigned long action, void *hcpu) | ||
190 | { | 192 | { |
193 | int hotcpu = (unsigned long)hcpu; | ||
191 | struct cpuidle_device *dev = | 194 | struct cpuidle_device *dev = |
192 | per_cpu_ptr(pseries_cpuidle_devices, cpu); | 195 | per_cpu_ptr(pseries_cpuidle_devices, hotcpu); |
193 | if (dev && cpuidle_get_driver()) { | 196 | |
194 | cpuidle_disable_device(dev); | 197 | switch (action & 0xf) { |
195 | cpuidle_enable_device(dev); | 198 | case CPU_ONLINE: |
199 | if (dev && cpuidle_get_driver()) { | ||
200 | cpuidle_disable_device(dev); | ||
201 | cpuidle_enable_device(dev); | ||
202 | } | ||
203 | break; | ||
196 | } | 204 | } |
197 | return 0; | 205 | return NOTIFY_OK; |
198 | } | 206 | } |
199 | 207 | ||
208 | static struct notifier_block setup_hotplug_notifier = { | ||
209 | .notifier_call = pseries_cpuidle_add_cpu_notifier, | ||
210 | }; | ||
211 | |||
200 | /* | 212 | /* |
201 | * pseries_cpuidle_driver_init() | 213 | * pseries_cpuidle_driver_init() |
202 | */ | 214 | */ |
@@ -321,6 +333,7 @@ static int __init pseries_processor_idle_init(void) | |||
321 | return retval; | 333 | return retval; |
322 | } | 334 | } |
323 | 335 | ||
336 | register_cpu_notifier(&setup_hotplug_notifier); | ||
324 | printk(KERN_DEBUG "pseries_idle_driver registered\n"); | 337 | printk(KERN_DEBUG "pseries_idle_driver registered\n"); |
325 | 338 | ||
326 | return 0; | 339 | return 0; |
diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c index e16bb8d48550..71706bc34a0d 100644 --- a/arch/powerpc/platforms/pseries/smp.c +++ b/arch/powerpc/platforms/pseries/smp.c | |||
@@ -147,7 +147,6 @@ static void __devinit smp_xics_setup_cpu(int cpu) | |||
147 | set_cpu_current_state(cpu, CPU_STATE_ONLINE); | 147 | set_cpu_current_state(cpu, CPU_STATE_ONLINE); |
148 | set_default_offline_state(cpu); | 148 | set_default_offline_state(cpu); |
149 | #endif | 149 | #endif |
150 | pseries_notify_cpuidle_add_cpu(cpu); | ||
151 | } | 150 | } |
152 | 151 | ||
153 | static int __devinit smp_pSeries_kick_cpu(int nr) | 152 | static int __devinit smp_pSeries_kick_cpu(int nr) |