diff options
Diffstat (limited to 'arch/arm/common')
| -rw-r--r-- | arch/arm/common/bL_switcher.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/common/bL_switcher.c b/arch/arm/common/bL_switcher.c index 7002de360d2..f0dc025077d 100644 --- a/arch/arm/common/bL_switcher.c +++ b/arch/arm/common/bL_switcher.c @@ -27,6 +27,7 @@ #include <linux/notifier.h> #include <linux/mm.h> #include <linux/mutex.h> +#include <linux/smp.h> #include <linux/spinlock.h> #include <linux/string.h> #include <linux/sysfs.h> @@ -531,6 +532,25 @@ static int bL_switcher_halve_cpus(void) return 0; } +static void bL_switcher_trace_trigger_cpu(void *__always_unused info) +{ + trace_cpu_migrate_current(get_ns(), read_mpidr()); +} + +static int bL_switcher_trace_trigger(void) +{ + int ret; + + preempt_disable(); + + bL_switcher_trace_trigger_cpu(NULL); + ret = smp_call_function(bL_switcher_trace_trigger_cpu, NULL, true); + + preempt_enable(); + + return ret; +} + static int bL_switcher_enable(void) { int cpu, ret; @@ -553,6 +573,8 @@ static int bL_switcher_enable(void) if (ret) goto error; + bL_switcher_trace_trigger(); + for_each_online_cpu(cpu) { struct bL_thread *t = &bL_threads[cpu]; spin_lock_init(&t->lock); @@ -637,6 +659,8 @@ static void bL_switcher_disable(void) } bL_switcher_restore_cpus(); + bL_switcher_trace_trigger(); + bL_activation_notify(BL_NOTIFY_POST_DISABLE); out: @@ -670,11 +694,23 @@ static ssize_t bL_switcher_active_store(struct kobject *kobj, return (ret >= 0) ? count : ret; } +static ssize_t bL_switcher_trace_trigger_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + int ret = bL_switcher_trace_trigger(); + + return ret ? ret : count; +} + static struct kobj_attribute bL_switcher_active_attr = __ATTR(active, 0644, bL_switcher_active_show, bL_switcher_active_store); +static struct kobj_attribute bL_switcher_trace_trigger_attr = + __ATTR(trace_trigger, 0200, NULL, bL_switcher_trace_trigger_store); + static struct attribute *bL_switcher_attrs[] = { &bL_switcher_active_attr.attr, + &bL_switcher_trace_trigger_attr.attr, NULL, }; |