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author | Al Viro <viro@zeniv.linux.org.uk> | 2012-11-17 04:27:58 +0100 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-11-17 04:27:58 +0100 |
commit | d05f06e60df4f56a70fb8a3e46335b40687169e9 (patch) | |
tree | c1eec6749fed86a21b08606e1e4acefe4b033253 /arch/powerpc | |
parent | Merge branch 'arch-s390' into no-rebases (diff) | |
parent | frv: fix the broken preempt (diff) | |
download | linux-d05f06e60df4f56a70fb8a3e46335b40687169e9.tar.xz linux-d05f06e60df4f56a70fb8a3e46335b40687169e9.zip |
Merge branch 'arch-frv' into no-rebases
Diffstat (limited to 'arch/powerpc')
-rw-r--r-- | arch/powerpc/include/asm/kvm_book3s_32.h | 1 | ||||
-rw-r--r-- | arch/powerpc/include/asm/processor.h | 4 | ||||
-rw-r--r-- | arch/powerpc/kernel/sysfs.c | 2 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_32_mmu_host.c | 4 | ||||
-rw-r--r-- | arch/powerpc/perf/core-book3s.c | 2 | ||||
-rw-r--r-- | arch/powerpc/platforms/pseries/processor_idle.c | 62 |
6 files changed, 36 insertions, 39 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s_32.h b/arch/powerpc/include/asm/kvm_book3s_32.h index 38040ff82063..ce0ef6ce8f86 100644 --- a/arch/powerpc/include/asm/kvm_book3s_32.h +++ b/arch/powerpc/include/asm/kvm_book3s_32.h @@ -42,5 +42,6 @@ static inline void svcpu_put(struct kvmppc_book3s_shadow_vcpu *svcpu) #define SID_SHIFT 28 #define ESID_MASK 0xf0000000 #define VSID_MASK 0x00fffffff0000000ULL +#define VPN_SHIFT 12 #endif /* __ASM_KVM_BOOK3S_32_H__ */ diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index 8734b3855272..87502046c0dc 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h @@ -388,9 +388,9 @@ extern int powersave_nap; /* set if nap mode can be used in idle loop */ extern void power7_nap(void); #ifdef CONFIG_PSERIES_IDLE -extern void update_smt_snooze_delay(int snooze); +extern void update_smt_snooze_delay(int cpu, int residency); #else -static inline void update_smt_snooze_delay(int snooze) {} +static inline void update_smt_snooze_delay(int cpu, int residency) {} #endif extern void flush_instruction_cache(void); diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c index 8302af649219..cf357a059ddb 100644 --- a/arch/powerpc/kernel/sysfs.c +++ b/arch/powerpc/kernel/sysfs.c @@ -50,7 +50,7 @@ static ssize_t store_smt_snooze_delay(struct device *dev, return -EINVAL; per_cpu(smt_snooze_delay, cpu->dev.id) = snooze; - update_smt_snooze_delay(snooze); + update_smt_snooze_delay(cpu->dev.id, snooze); return count; } diff --git a/arch/powerpc/kvm/book3s_32_mmu_host.c b/arch/powerpc/kvm/book3s_32_mmu_host.c index 00aa61268e0d..b0f625a33345 100644 --- a/arch/powerpc/kvm/book3s_32_mmu_host.c +++ b/arch/powerpc/kvm/book3s_32_mmu_host.c @@ -173,8 +173,8 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte) BUG_ON(!map); vsid = map->host_vsid; - vpn = (vsid << (SID_SHIFT - VPN_SHIFT)) | ((eaddr & ~ESID_MASK) >> VPN_SHIFT) - + vpn = (vsid << (SID_SHIFT - VPN_SHIFT)) | + ((eaddr & ~ESID_MASK) >> VPN_SHIFT); next_pteg: if (rr == 16) { primary = !primary; diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c index 0db88f501f91..aa2465e21f1a 100644 --- a/arch/powerpc/perf/core-book3s.c +++ b/arch/powerpc/perf/core-book3s.c @@ -1463,7 +1463,7 @@ static void perf_event_interrupt(struct pt_regs *regs) if (!event->hw.idx || is_limited_pmc(event->hw.idx)) continue; val = read_pmc(event->hw.idx); - if (pmc_overflow(val)) { + if ((int)val < 0) { /* event has overflowed */ found = 1; record_and_restart(event, val, regs); diff --git a/arch/powerpc/platforms/pseries/processor_idle.c b/arch/powerpc/platforms/pseries/processor_idle.c index 455760b1fe6e..45d00e5fe14d 100644 --- a/arch/powerpc/platforms/pseries/processor_idle.c +++ b/arch/powerpc/platforms/pseries/processor_idle.c @@ -33,13 +33,6 @@ static int max_idle_state = MAX_IDLE_STATE_COUNT - 1; static struct cpuidle_device __percpu *pseries_cpuidle_devices; static struct cpuidle_state *cpuidle_state_table; -void update_smt_snooze_delay(int snooze) -{ - struct cpuidle_driver *drv = cpuidle_get_driver(); - if (drv) - drv->states[0].target_residency = snooze; -} - static inline void idle_loop_prolog(unsigned long *in_purr, ktime_t *kt_before) { @@ -66,32 +59,22 @@ static int snooze_loop(struct cpuidle_device *dev, { unsigned long in_purr; ktime_t kt_before; - unsigned long start_snooze; - long snooze = drv->states[0].target_residency; + int cpu = dev->cpu; idle_loop_prolog(&in_purr, &kt_before); + local_irq_enable(); + set_thread_flag(TIF_POLLING_NRFLAG); - if (snooze) { - start_snooze = get_tb() + snooze * tb_ticks_per_usec; - local_irq_enable(); - set_thread_flag(TIF_POLLING_NRFLAG); - - while ((snooze < 0) || (get_tb() < start_snooze)) { - if (need_resched() || cpu_is_offline(dev->cpu)) - goto out; - ppc64_runlatch_off(); - HMT_low(); - HMT_very_low(); - } - - HMT_medium(); - clear_thread_flag(TIF_POLLING_NRFLAG); - smp_mb(); - local_irq_disable(); + while ((!need_resched()) && cpu_online(cpu)) { + ppc64_runlatch_off(); + HMT_low(); + HMT_very_low(); } -out: HMT_medium(); + clear_thread_flag(TIF_POLLING_NRFLAG); + smp_mb(); + dev->last_residency = (int)idle_loop_epilog(in_purr, kt_before); return index; @@ -172,8 +155,8 @@ static struct cpuidle_state dedicated_states[MAX_IDLE_STATE_COUNT] = { .name = "CEDE", .desc = "CEDE", .flags = CPUIDLE_FLAG_TIME_VALID, - .exit_latency = 1, - .target_residency = 10, + .exit_latency = 10, + .target_residency = 100, .enter = &dedicated_cede_loop }, }; @@ -190,6 +173,23 @@ static struct cpuidle_state shared_states[MAX_IDLE_STATE_COUNT] = { .enter = &shared_cede_loop }, }; +void update_smt_snooze_delay(int cpu, int residency) +{ + struct cpuidle_driver *drv = cpuidle_get_driver(); + struct cpuidle_device *dev = per_cpu(cpuidle_devices, cpu); + + if (cpuidle_state_table != dedicated_states) + return; + + if (residency < 0) { + /* Disable the Nap state on that cpu */ + if (dev) + dev->states_usage[1].disable = 1; + } else + if (drv) + drv->states[1].target_residency = residency; +} + static int pseries_cpuidle_add_cpu_notifier(struct notifier_block *n, unsigned long action, void *hcpu) { @@ -246,10 +246,6 @@ static int pseries_cpuidle_driver_init(void) drv->states[drv->state_count] = /* structure copy */ cpuidle_state_table[idle_state]; - if (cpuidle_state_table == dedicated_states) - drv->states[drv->state_count].target_residency = - __get_cpu_var(smt_snooze_delay); - drv->state_count += 1; } |