- cpu_notifier_register_begin();
- ret = uncore_cpumask_init(!cret);
- if (ret)
- goto err;
- cpu_notifier_register_done();
+ /*
+ * Install callbacks. Core will call them for each online cpu.
+ *
+ * The first online cpu of each package allocates and takes
+ * the refcounts for all other online cpus in that package.
+ * If msrs are not enabled no allocation is required and
+ * uncore_cpu_prepare() is not called for each online cpu.
+ */
+ if (!cret) {
+ ret = cpuhp_setup_state(CPUHP_PERF_X86_UNCORE_PREP,
+ "PERF_X86_UNCORE_PREP",
+ uncore_cpu_prepare, NULL);
+ if (ret)
+ goto err;
+ } else {
+ cpuhp_setup_state_nocalls(CPUHP_PERF_X86_UNCORE_PREP,
+ "PERF_X86_UNCORE_PREP",
+ uncore_cpu_prepare, NULL);
+ }
+ first_init = 1;
+ cpuhp_setup_state(CPUHP_AP_PERF_X86_UNCORE_STARTING,
+ "AP_PERF_X86_UNCORE_STARTING",
+ uncore_cpu_starting, uncore_cpu_dying);
+ first_init = 0;
+ cpuhp_setup_state(CPUHP_AP_PERF_X86_UNCORE_ONLINE,
+ "AP_PERF_X86_UNCORE_ONLINE",
+ uncore_event_cpu_online, uncore_event_cpu_offline);