73 struct pcpu {  struct
83 static struct pcpu pcpu_devices[NR_CPUS];  argument
132 static int pcpu_sigp_retry(struct pcpu *pcpu, u8 order, u32 parm)  in pcpu_sigp_retry()  argument
137 		cc = __pcpu_sigp(pcpu->address, order, parm, NULL);  in pcpu_sigp_retry()
146 static inline int pcpu_stopped(struct pcpu *pcpu)  in pcpu_stopped()  argument
150 	if (__pcpu_sigp(pcpu->address, SIGP_SENSE,  in pcpu_stopped()
156 static inline int pcpu_running(struct pcpu *pcpu)  in pcpu_running()  argument
158 	if (__pcpu_sigp(pcpu->address, SIGP_SENSE_RUNNING,  in pcpu_running()
168 static struct pcpu *pcpu_find_address(const struct cpumask *mask, u16 address)  in pcpu_find_address()
178 static void pcpu_ec_call(struct pcpu *pcpu, int ec_bit)  in pcpu_ec_call()  argument
182 	if (test_and_set_bit(ec_bit, &pcpu->ec_mask))  in pcpu_ec_call()
184 	order = pcpu_running(pcpu) ? SIGP_EXTERNAL_CALL : SIGP_EMERGENCY_SIGNAL;  in pcpu_ec_call()
185 	pcpu->ec_clk = get_tod_clock_fast();  in pcpu_ec_call()
186 	pcpu_sigp_retry(pcpu, order, 0);  in pcpu_ec_call()
189 static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu)  in pcpu_alloc_lowcore()  argument
194 	if (pcpu != &pcpu_devices[0]) {  in pcpu_alloc_lowcore()
195 		pcpu->lowcore =	(struct lowcore *)  in pcpu_alloc_lowcore()
198 		if (!pcpu->lowcore || !nodat_stack)  in pcpu_alloc_lowcore()
201 		nodat_stack = pcpu->lowcore->nodat_stack - STACK_INIT_OFFSET;  in pcpu_alloc_lowcore()
206 	lc = pcpu->lowcore;  in pcpu_alloc_lowcore()
220 	pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, (u32)(unsigned long) lc);  in pcpu_alloc_lowcore()
228 	if (pcpu != &pcpu_devices[0]) {  in pcpu_alloc_lowcore()
230 		free_pages((unsigned long) pcpu->lowcore, LC_ORDER);  in pcpu_alloc_lowcore()
235 static void pcpu_free_lowcore(struct pcpu *pcpu)  in pcpu_free_lowcore()  argument
239 	nodat_stack = pcpu->lowcore->nodat_stack - STACK_INIT_OFFSET;  in pcpu_free_lowcore()
240 	async_stack = pcpu->lowcore->async_stack - STACK_INIT_OFFSET;  in pcpu_free_lowcore()
241 	lowcore = (unsigned long) pcpu->lowcore;  in pcpu_free_lowcore()
243 	pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, 0);  in pcpu_free_lowcore()
244 	lowcore_ptr[pcpu - pcpu_devices] = NULL;  in pcpu_free_lowcore()
245 	vdso_free_per_cpu(pcpu->lowcore);  in pcpu_free_lowcore()
246 	nmi_free_per_cpu(pcpu->lowcore);  in pcpu_free_lowcore()
248 	if (pcpu == &pcpu_devices[0])  in pcpu_free_lowcore()
254 static void pcpu_prepare_secondary(struct pcpu *pcpu, int cpu)  in pcpu_prepare_secondary()  argument
256 	struct lowcore *lc = pcpu->lowcore;  in pcpu_prepare_secondary()
277 static void pcpu_attach_task(struct pcpu *pcpu, struct task_struct *tsk)  in pcpu_attach_task()  argument
279 	struct lowcore *lc = pcpu->lowcore;  in pcpu_attach_task()
294 static void pcpu_start_fn(struct pcpu *pcpu, void (*func)(void *), void *data)  in pcpu_start_fn()  argument
296 	struct lowcore *lc = pcpu->lowcore;  in pcpu_start_fn()
302 	pcpu_sigp_retry(pcpu, SIGP_RESTART, 0);  in pcpu_start_fn()
313 static void __no_sanitize_address pcpu_delegate(struct pcpu *pcpu,  in pcpu_delegate()  argument
317 	struct lowcore *lc = lowcore_ptr[pcpu - pcpu_devices];  in pcpu_delegate()
321 	if (pcpu->address == source_cpu)  in pcpu_delegate()
324 	pcpu_sigp_retry(pcpu, SIGP_STOP, 0);  in pcpu_delegate()
336 		: : "d" (pcpu->address), "d" (source_cpu),  in pcpu_delegate()
367 	struct pcpu *pcpu;  in smp_call_online_cpu()  local
370 	pcpu = pcpu_find_address(cpu_online_mask, stap());  in smp_call_online_cpu()
371 	if (!pcpu)  in smp_call_online_cpu()
373 		pcpu = pcpu_devices + cpumask_first(cpu_online_mask);  in smp_call_online_cpu()
374 	pcpu_delegate(pcpu, func, data, (unsigned long) restart_stack);  in smp_call_online_cpu()
438 		struct pcpu *pcpu = pcpu_devices + cpu;  in smp_emergency_stop()  local
439 		set_bit(ec_stop_cpu, &pcpu->ec_mask);  in smp_emergency_stop()
440 		while (__pcpu_sigp(pcpu->address, SIGP_EMERGENCY_SIGNAL,  in smp_emergency_stop()
578 	struct pcpu *pcpu = pcpu_devices + cpu;  in smp_store_status()  local
581 	pa = __pa(&pcpu->lowcore->floating_pt_save_area);  in smp_store_status()
582 	if (__pcpu_sigp_relax(pcpu->address, SIGP_STORE_STATUS_AT_ADDRESS,  in smp_store_status()
587 	pa = __pa(pcpu->lowcore->mcesad & MCESA_ORIGIN_MASK);  in smp_store_status()
589 		pa |= pcpu->lowcore->mcesad & MCESA_LC_MASK;  in smp_store_status()
590 	if (__pcpu_sigp_relax(pcpu->address, SIGP_STORE_ADDITIONAL_STATUS,  in smp_store_status()
729 	struct pcpu *pcpu;  in __smp_rescan_cpus()  local
744 			pcpu = pcpu_devices + cpu;  in __smp_rescan_cpus()
745 			pcpu->address = address + j;  in __smp_rescan_cpus()
746 			pcpu->state =  in __smp_rescan_cpus()
852 	struct pcpu *pcpu;  in __cpu_up()  local
855 	pcpu = pcpu_devices + cpu;  in __cpu_up()
856 	if (pcpu->state != CPU_STATE_CONFIGURED)  in __cpu_up()
873 	rc = pcpu_alloc_lowcore(pcpu, cpu);  in __cpu_up()
876 	pcpu_prepare_secondary(pcpu, cpu);  in __cpu_up()
877 	pcpu_attach_task(pcpu, tidle);  in __cpu_up()
878 	pcpu_start_fn(pcpu, smp_start_secondary, NULL);  in __cpu_up()
915 	struct pcpu *pcpu;  in __cpu_die()  local
918 	pcpu = pcpu_devices + cpu;  in __cpu_die()
919 	while (!pcpu_stopped(pcpu))  in __cpu_die()
921 	pcpu_free_lowcore(pcpu);  in __cpu_die()
959 	struct pcpu *pcpu = pcpu_devices;  in smp_prepare_boot_cpu()  local
962 	pcpu->state = CPU_STATE_CONFIGURED;  in smp_prepare_boot_cpu()
963 	pcpu->lowcore = (struct lowcore *)(unsigned long) store_prefix();  in smp_prepare_boot_cpu()
1006 	struct pcpu *pcpu;  in cpu_configure_store()  local
1025 	pcpu = pcpu_devices + cpu;  in cpu_configure_store()
1029 		if (pcpu->state != CPU_STATE_CONFIGURED)  in cpu_configure_store()
1031 		rc = sclp_core_deconfigure(pcpu->address >> smp_cpu_mt_shift);  in cpu_configure_store()
1037 			pcpu[i].state = CPU_STATE_STANDBY;  in cpu_configure_store()
1044 		if (pcpu->state != CPU_STATE_STANDBY)  in cpu_configure_store()
1046 		rc = sclp_core_configure(pcpu->address >> smp_cpu_mt_shift);  in cpu_configure_store()
1052 			pcpu[i].state = CPU_STATE_CONFIGURED;  in cpu_configure_store()