74 struct pcpu {  struct
84 static struct pcpu pcpu_devices[NR_CPUS];  argument
133 static int pcpu_sigp_retry(struct pcpu *pcpu, u8 order, u32 parm)  in pcpu_sigp_retry()  argument
138 		cc = __pcpu_sigp(pcpu->address, order, parm, NULL);  in pcpu_sigp_retry()
147 static inline int pcpu_stopped(struct pcpu *pcpu)  in pcpu_stopped()  argument
151 	if (__pcpu_sigp(pcpu->address, SIGP_SENSE,  in pcpu_stopped()
157 static inline int pcpu_running(struct pcpu *pcpu)  in pcpu_running()  argument
159 	if (__pcpu_sigp(pcpu->address, SIGP_SENSE_RUNNING,  in pcpu_running()
169 static struct pcpu *pcpu_find_address(const struct cpumask *mask, u16 address)  in pcpu_find_address()
179 static void pcpu_ec_call(struct pcpu *pcpu, int ec_bit)  in pcpu_ec_call()  argument
183 	if (test_and_set_bit(ec_bit, &pcpu->ec_mask))  in pcpu_ec_call()
185 	order = pcpu_running(pcpu) ? SIGP_EXTERNAL_CALL : SIGP_EMERGENCY_SIGNAL;  in pcpu_ec_call()
186 	pcpu->ec_clk = get_tod_clock_fast();  in pcpu_ec_call()
187 	pcpu_sigp_retry(pcpu, order, 0);  in pcpu_ec_call()
190 static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu)  in pcpu_alloc_lowcore()  argument
195 	if (pcpu != &pcpu_devices[0]) {  in pcpu_alloc_lowcore()
196 		pcpu->lowcore =	(struct lowcore *)  in pcpu_alloc_lowcore()
199 		if (!pcpu->lowcore || !nodat_stack)  in pcpu_alloc_lowcore()
202 		nodat_stack = pcpu->lowcore->nodat_stack - STACK_INIT_OFFSET;  in pcpu_alloc_lowcore()
207 	lc = pcpu->lowcore;  in pcpu_alloc_lowcore()
223 	pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, (u32)(unsigned long) lc);  in pcpu_alloc_lowcore()
231 	if (pcpu != &pcpu_devices[0]) {  in pcpu_alloc_lowcore()
233 		free_pages((unsigned long) pcpu->lowcore, LC_ORDER);  in pcpu_alloc_lowcore()
238 static void pcpu_free_lowcore(struct pcpu *pcpu)  in pcpu_free_lowcore()  argument
242 	nodat_stack = pcpu->lowcore->nodat_stack - STACK_INIT_OFFSET;  in pcpu_free_lowcore()
243 	async_stack = pcpu->lowcore->async_stack - STACK_INIT_OFFSET;  in pcpu_free_lowcore()
244 	lowcore = (unsigned long) pcpu->lowcore;  in pcpu_free_lowcore()
246 	pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, 0);  in pcpu_free_lowcore()
247 	lowcore_ptr[pcpu - pcpu_devices] = NULL;  in pcpu_free_lowcore()
248 	vdso_free_per_cpu(pcpu->lowcore);  in pcpu_free_lowcore()
249 	nmi_free_per_cpu(pcpu->lowcore);  in pcpu_free_lowcore()
251 	if (pcpu == &pcpu_devices[0])  in pcpu_free_lowcore()
257 static void pcpu_prepare_secondary(struct pcpu *pcpu, int cpu)  in pcpu_prepare_secondary()  argument
259 	struct lowcore *lc = pcpu->lowcore;  in pcpu_prepare_secondary()
283 static void pcpu_attach_task(struct pcpu *pcpu, struct task_struct *tsk)  in pcpu_attach_task()  argument
285 	struct lowcore *lc = pcpu->lowcore;  in pcpu_attach_task()
300 static void pcpu_start_fn(struct pcpu *pcpu, void (*func)(void *), void *data)  in pcpu_start_fn()  argument
302 	struct lowcore *lc = pcpu->lowcore;  in pcpu_start_fn()
308 	pcpu_sigp_retry(pcpu, SIGP_RESTART, 0);  in pcpu_start_fn()
319 static void __no_sanitize_address pcpu_delegate(struct pcpu *pcpu,  in pcpu_delegate()  argument
323 	struct lowcore *lc = lowcore_ptr[pcpu - pcpu_devices];  in pcpu_delegate()
327 	if (pcpu->address == source_cpu)  in pcpu_delegate()
330 	pcpu_sigp_retry(pcpu, SIGP_STOP, 0);  in pcpu_delegate()
342 		: : "d" (pcpu->address), "d" (source_cpu),  in pcpu_delegate()
373 	struct pcpu *pcpu;  in smp_call_online_cpu()  local
376 	pcpu = pcpu_find_address(cpu_online_mask, stap());  in smp_call_online_cpu()
377 	if (!pcpu)  in smp_call_online_cpu()
379 		pcpu = pcpu_devices + cpumask_first(cpu_online_mask);  in smp_call_online_cpu()
380 	pcpu_delegate(pcpu, func, data, (unsigned long) restart_stack);  in smp_call_online_cpu()
446 		struct pcpu *pcpu = pcpu_devices + cpu;  in smp_emergency_stop()  local
447 		set_bit(ec_stop_cpu, &pcpu->ec_mask);  in smp_emergency_stop()
448 		while (__pcpu_sigp(pcpu->address, SIGP_EMERGENCY_SIGNAL,  in smp_emergency_stop()
588 	struct pcpu *pcpu = pcpu_devices + cpu;  in smp_store_status()  local
591 	pa = __pa(&pcpu->lowcore->floating_pt_save_area);  in smp_store_status()
592 	if (__pcpu_sigp_relax(pcpu->address, SIGP_STORE_STATUS_AT_ADDRESS,  in smp_store_status()
597 	pa = __pa(pcpu->lowcore->mcesad & MCESA_ORIGIN_MASK);  in smp_store_status()
599 		pa |= pcpu->lowcore->mcesad & MCESA_LC_MASK;  in smp_store_status()
600 	if (__pcpu_sigp_relax(pcpu->address, SIGP_STORE_ADDITIONAL_STATUS,  in smp_store_status()
745 	struct pcpu *pcpu;  in smp_add_core()  local
757 		pcpu = pcpu_devices + cpu;  in smp_add_core()
758 		pcpu->address = address + i;  in smp_add_core()
760 			pcpu->state = CPU_STATE_CONFIGURED;  in smp_add_core()
762 			pcpu->state = CPU_STATE_STANDBY;  in smp_add_core()
899 	struct pcpu *pcpu;  in __cpu_up()  local
902 	pcpu = pcpu_devices + cpu;  in __cpu_up()
903 	if (pcpu->state != CPU_STATE_CONFIGURED)  in __cpu_up()
920 	rc = pcpu_alloc_lowcore(pcpu, cpu);  in __cpu_up()
923 	pcpu_prepare_secondary(pcpu, cpu);  in __cpu_up()
924 	pcpu_attach_task(pcpu, tidle);  in __cpu_up()
925 	pcpu_start_fn(pcpu, smp_start_secondary, NULL);  in __cpu_up()
963 	struct pcpu *pcpu;  in __cpu_die()  local
966 	pcpu = pcpu_devices + cpu;  in __cpu_die()
967 	while (!pcpu_stopped(pcpu))  in __cpu_die()
969 	pcpu_free_lowcore(pcpu);  in __cpu_die()
1007 	struct pcpu *pcpu = pcpu_devices;  in smp_prepare_boot_cpu()  local
1010 	pcpu->state = CPU_STATE_CONFIGURED;  in smp_prepare_boot_cpu()
1011 	pcpu->lowcore = (struct lowcore *)(unsigned long) store_prefix();  in smp_prepare_boot_cpu()
1050 	struct pcpu *pcpu;  in cpu_configure_store()  local
1069 	pcpu = pcpu_devices + cpu;  in cpu_configure_store()
1073 		if (pcpu->state != CPU_STATE_CONFIGURED)  in cpu_configure_store()
1075 		rc = sclp_core_deconfigure(pcpu->address >> smp_cpu_mt_shift);  in cpu_configure_store()
1081 			pcpu[i].state = CPU_STATE_STANDBY;  in cpu_configure_store()
1088 		if (pcpu->state != CPU_STATE_STANDBY)  in cpu_configure_store()
1090 		rc = sclp_core_configure(pcpu->address >> smp_cpu_mt_shift);  in cpu_configure_store()
1096 			pcpu[i].state = CPU_STATE_CONFIGURED;  in cpu_configure_store()