/*
* Check if exiting cpu is the designated reader. If so migrate the
* events when there is a valid target available
*/
static int cstate_cpu_exit(unsigned int cpu)
{
unsigned int target;
if (has_cstate_core &&
cpumask_test_and_clear_cpu(cpu, &cstate_core_cpu_mask)) {
target = cpumask_any_but(topology_sibling_cpumask(cpu), cpu);
/* Migrate events if there is a valid target */
if (target < nr_cpu_ids) {
cpumask_set_cpu(target, &cstate_core_cpu_mask);
perf_pmu_migrate_context(&cstate_core_pmu, cpu, target);
}
}
if (has_cstate_pkg &&
cpumask_test_and_clear_cpu(cpu, &cstate_pkg_cpu_mask)) {
target = cpumask_any_but(topology_core_cpumask(cpu), cpu);
/* Migrate events if there is a valid target */
if (target < nr_cpu_ids) {
cpumask_set_cpu(target, &cstate_pkg_cpu_mask);
perf_pmu_migrate_context(&cstate_pkg_pmu, cpu, target);
}
}
return 0;
}
static int power_cpu_exit(unsigned int cpu)
{
int target;
if (!cpumask_test_and_clear_cpu(cpu, &cpu_mask))
return 0;
/*
* Find a new CPU on the same compute unit, if was set in cpumask
* and still some CPUs on compute unit. Then migrate event and
* context to new CPU.
*/
target = cpumask_any_but(topology_sibling_cpumask(cpu), cpu);
if (target < nr_cpumask_bits) {
cpumask_set_cpu(target, &cpu_mask);
perf_pmu_migrate_context(&pmu_class, cpu, target);
}
return 0;
}
