diff options
| -rw-r--r-- | drivers/clocksource/arm_arch_timer.c | 31 | ||||
| -rw-r--r-- | include/linux/cpuhotplug.h | 1 |
2 files changed, 27 insertions, 5 deletions
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 7dd2c615bce2..d1e9e556da81 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -917,7 +917,7 @@ static void arch_timer_evtstrm_enable(unsigned int divider) #ifdef CONFIG_ARM64 /* ECV is likely to require a large divider. Use the EVNTIS flag. */ - if (cpus_have_const_cap(ARM64_HAS_ECV) && divider > 15) { + if (cpus_have_final_cap(ARM64_HAS_ECV) && divider > 15) { cntkctl |= ARCH_TIMER_EVT_INTERVAL_SCALE; divider -= 8; } @@ -955,6 +955,30 @@ static void arch_timer_configure_evtstream(void) arch_timer_evtstrm_enable(max(0, lsb)); } +static int arch_timer_evtstrm_starting_cpu(unsigned int cpu) +{ + arch_timer_configure_evtstream(); + return 0; +} + +static int arch_timer_evtstrm_dying_cpu(unsigned int cpu) +{ + cpumask_clear_cpu(smp_processor_id(), &evtstrm_available); + return 0; +} + +static int __init arch_timer_evtstrm_register(void) +{ + if (!arch_timer_evt || !evtstrm_enable) + return 0; + + return cpuhp_setup_state(CPUHP_AP_ARM_ARCH_TIMER_EVTSTRM_STARTING, + "clockevents/arm/arch_timer_evtstrm:starting", + arch_timer_evtstrm_starting_cpu, + arch_timer_evtstrm_dying_cpu); +} +core_initcall(arch_timer_evtstrm_register); + static void arch_counter_set_user_access(void) { u32 cntkctl = arch_timer_get_cntkctl(); @@ -1016,8 +1040,6 @@ static int arch_timer_starting_cpu(unsigned int cpu) } arch_counter_set_user_access(); - if (evtstrm_enable) - arch_timer_configure_evtstream(); return 0; } @@ -1164,8 +1186,6 @@ static int arch_timer_dying_cpu(unsigned int cpu) { struct clock_event_device *clk = this_cpu_ptr(arch_timer_evt); - cpumask_clear_cpu(smp_processor_id(), &evtstrm_available); - arch_timer_stop(clk); return 0; } @@ -1279,6 +1299,7 @@ out_unreg_notify: out_free: free_percpu(arch_timer_evt); + arch_timer_evt = NULL; out: return err; } diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h index 068f7738be22..bb4d0bcac81b 100644 --- a/include/linux/cpuhotplug.h +++ b/include/linux/cpuhotplug.h @@ -172,6 +172,7 @@ enum cpuhp_state { CPUHP_AP_ARM_L2X0_STARTING, CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING, CPUHP_AP_ARM_ARCH_TIMER_STARTING, + CPUHP_AP_ARM_ARCH_TIMER_EVTSTRM_STARTING, CPUHP_AP_ARM_GLOBAL_TIMER_STARTING, CPUHP_AP_JCORE_TIMER_STARTING, CPUHP_AP_ARM_TWD_STARTING, |