6  * very straightforward.  Bringing a CPU up is simply a matter of
11  * Because virtual CPUs can be scheduled onto any real CPU, there's no
31 #include <asm/cpu.h>
62 	int cpu;  in cpu_bringup()  local
73 	cpu = smp_processor_id();  in cpu_bringup()
74 	smp_store_cpu_info(cpu);  in cpu_bringup()
75 	cpu_data(cpu).x86_max_cores = 1;  in cpu_bringup()
76 	set_cpu_sibling_map(cpu);  in cpu_bringup()
82 	notify_cpu_starting(cpu);  in cpu_bringup()
84 	set_cpu_online(cpu, true);  in cpu_bringup()
86 	cpu_set_state_online(cpu);  /* Implies full memory barrier. */  in cpu_bringup()
98 void xen_smp_intr_free_pv(unsigned int cpu)  in xen_smp_intr_free_pv()  argument
100 	if (per_cpu(xen_irq_work, cpu).irq >= 0) {  in xen_smp_intr_free_pv()
101 		unbind_from_irqhandler(per_cpu(xen_irq_work, cpu).irq, NULL);  in xen_smp_intr_free_pv()
102 		per_cpu(xen_irq_work, cpu).irq = -1;  in xen_smp_intr_free_pv()
103 		kfree(per_cpu(xen_irq_work, cpu).name);  in xen_smp_intr_free_pv()
104 		per_cpu(xen_irq_work, cpu).name = NULL;  in xen_smp_intr_free_pv()
107 	if (per_cpu(xen_pmu_irq, cpu).irq >= 0) {  in xen_smp_intr_free_pv()
108 		unbind_from_irqhandler(per_cpu(xen_pmu_irq, cpu).irq, NULL);  in xen_smp_intr_free_pv()
109 		per_cpu(xen_pmu_irq, cpu).irq = -1;  in xen_smp_intr_free_pv()
110 		kfree(per_cpu(xen_pmu_irq, cpu).name);  in xen_smp_intr_free_pv()
111 		per_cpu(xen_pmu_irq, cpu).name = NULL;  in xen_smp_intr_free_pv()
115 int xen_smp_intr_init_pv(unsigned int cpu)  in xen_smp_intr_init_pv()  argument
120 	callfunc_name = kasprintf(GFP_KERNEL, "irqwork%d", cpu);  in xen_smp_intr_init_pv()
122 				    cpu,  in xen_smp_intr_init_pv()
129 	per_cpu(xen_irq_work, cpu).irq = rc;  in xen_smp_intr_init_pv()
130 	per_cpu(xen_irq_work, cpu).name = callfunc_name;  in xen_smp_intr_init_pv()
133 		pmu_name = kasprintf(GFP_KERNEL, "pmu%d", cpu);  in xen_smp_intr_init_pv()
134 		rc = bind_virq_to_irqhandler(VIRQ_XENPMU, cpu,  in xen_smp_intr_init_pv()
140 		per_cpu(xen_pmu_irq, cpu).irq = rc;  in xen_smp_intr_init_pv()
141 		per_cpu(xen_pmu_irq, cpu).name = pmu_name;  in xen_smp_intr_init_pv()
147 	xen_smp_intr_free_pv(cpu);  in xen_smp_intr_init_pv()
176 	 * normally is not a problem, except when CPU hotplugging  in _get_smp_config()
193 		/* We've switched to the "real" per-cpu gdt, so make  in xen_pv_smp_prepare_boot_cpu()
210 	unsigned cpu;  in xen_pv_smp_prepare_cpus()  local
241 		for (cpu = nr_cpu_ids - 1; !cpu_possible(cpu); cpu--)  in xen_pv_smp_prepare_cpus()
243 		set_cpu_possible(cpu, false);  in xen_pv_smp_prepare_cpus()
246 	for_each_possible_cpu(cpu)  in xen_pv_smp_prepare_cpus()
247 		set_cpu_present(cpu, true);  in xen_pv_smp_prepare_cpus()
251 cpu_initialize_context(unsigned int cpu, struct task_struct *idle)  in cpu_initialize_context()  argument
258 	cpumask_set_cpu(cpu, cpu_callout_mask);  in cpu_initialize_context()
259 	if (cpumask_test_and_set_cpu(cpu, xen_cpu_initialized_map))  in cpu_initialize_context()
264 		cpumask_clear_cpu(cpu, xen_cpu_initialized_map);  in cpu_initialize_context()
265 		cpumask_clear_cpu(cpu, cpu_callout_mask);  in cpu_initialize_context()
269 	gdt = get_cpu_gdt_rw(cpu);  in cpu_initialize_context()
272 	 * Bring up the CPU in cpu_bringup_and_idle() with the stack  in cpu_initialize_context()
304 	ctxt->gs_base_kernel = per_cpu_offset(cpu);  in cpu_initialize_context()
309 	per_cpu(xen_cr3, cpu) = __pa(swapper_pg_dir);  in cpu_initialize_context()
312 	if (HYPERVISOR_vcpu_op(VCPUOP_initialise, xen_vcpu_nr(cpu), ctxt))  in cpu_initialize_context()
319 static int xen_pv_cpu_up(unsigned int cpu, struct task_struct *idle)  in xen_pv_cpu_up()  argument
323 	rc = common_cpu_up(cpu, idle);  in xen_pv_cpu_up()
327 	xen_setup_runstate_info(cpu);  in xen_pv_cpu_up()
333 	rc = cpu_check_up_prepare(cpu);  in xen_pv_cpu_up()
338 	per_cpu(xen_vcpu, cpu)->evtchn_upcall_mask = 1;  in xen_pv_cpu_up()
340 	rc = cpu_initialize_context(cpu, idle);  in xen_pv_cpu_up()
344 	xen_pmu_init(cpu);  in xen_pv_cpu_up()
346 	rc = HYPERVISOR_vcpu_op(VCPUOP_up, xen_vcpu_nr(cpu), NULL);  in xen_pv_cpu_up()
349 	while (cpu_report_state(cpu) != CPU_ONLINE)  in xen_pv_cpu_up()
358 	unsigned int cpu = smp_processor_id();  in xen_pv_cpu_disable()  local
359 	if (cpu == 0)  in xen_pv_cpu_disable()
368 static void xen_pv_cpu_die(unsigned int cpu)  in xen_pv_cpu_die()  argument
371 				  xen_vcpu_nr(cpu), NULL)) {  in xen_pv_cpu_die()
376 	if (common_cpu_die(cpu) == 0) {  in xen_pv_cpu_die()
377 		xen_smp_intr_free(cpu);  in xen_pv_cpu_die()
378 		xen_uninit_lock_cpu(cpu);  in xen_pv_cpu_die()
379 		xen_teardown_timer(cpu);  in xen_pv_cpu_die()
380 		xen_pmu_finish(cpu);  in xen_pv_cpu_die()
390 	 * commit 4b0c0f294 (tick: Cleanup NOHZ per cpu data on cpu down)  in xen_pv_play_dead()
407 static void xen_pv_cpu_die(unsigned int cpu)  in xen_pv_cpu_die()  argument
420 	int cpu = smp_processor_id();  in stop_self()  local
426 	set_cpu_online(cpu, false);  in stop_self()
428 	HYPERVISOR_vcpu_op(VCPUOP_down, xen_vcpu_nr(cpu), NULL);  in stop_self()