1 // SPDX-License-Identifier: GPL-2.0-or-later
15 #include <linux/cpu.h>
51 	/* Find the server numbers for the boot cpu. */  in xics_update_irq_servers()
60 	ireg = of_get_property(np, "ibm,ppc-interrupt-gserver#s", &ilen);  in xics_update_irq_servers()
69 	 * entry of "ibm,ppc-interrupt-gserver#s" property. Get the last  in xics_update_irq_servers()
70 	 * entry fom this property for current boot cpu id and use it as  in xics_update_irq_servers()
96 	index = (1UL << xics_interrupt_server_size) - 1 - gserver;  in xics_set_cpu_giq()
100 	WARN(status < 0, "set-indicator(%d, %d, %u) returned %d\n",  in xics_set_cpu_giq()
107 	icp_ops->set_priority(LOWEST_PRIORITY);  in xics_setup_cpu()
118 	xics_ics->mask_unknown(xics_ics, vec);  in xics_mask_unknown_vec()
134 	BUG_ON(request_irq(ipi, icp_ops->ipi_action,  in xics_request_ipi()
144 	smp_ops->cause_ipi = icp_ops->cause_ipi;  in xics_smp_probe()
157 	os_cppr->index = 0;  in xics_teardown_cpu()
158 	icp_ops->set_priority(0);  in xics_teardown_cpu()
159 	icp_ops->teardown_cpu();  in xics_teardown_cpu()
166 	icp_ops->flush_ipi();  in xics_kexec_teardown_cpu()
169 	 * Some machines need to have at least one cpu in the GIQ,  in xics_kexec_teardown_cpu()
170 	 * so leave the master cpu in the group.  in xics_kexec_teardown_cpu()
182 	int cpu = smp_processor_id(), hw_cpu = hard_smp_processor_id();  in xics_migrate_irqs_away()  local
186 	pr_debug("%s: CPU %u\n", __func__, cpu);  in xics_migrate_irqs_away()
193 	icp_ops->set_priority(0);  in xics_migrate_irqs_away()
204 		/* We can't set affinity on ISA interrupts */  in xics_migrate_irqs_away()
208 		if (!desc->action)  in xics_migrate_irqs_away()
219 		if (!chip || !chip->irq_set_affinity)  in xics_migrate_irqs_away()
222 		raw_spin_lock_irqsave(&desc->lock, flags);  in xics_migrate_irqs_away()
225 		server = xics_ics->get_server(xics_ics, irq);  in xics_migrate_irqs_away()
232 		/* We only support delivery to all cpus or to one cpu.  in xics_migrate_irqs_away()
233 		 * The irq has to be migrated only in the single cpu  in xics_migrate_irqs_away()
239 		/* This is expected during cpu offline. */  in xics_migrate_irqs_away()
240 		if (cpu_online(cpu))  in xics_migrate_irqs_away()
241 			pr_warn("IRQ %u affinity broken off cpu %u\n",  in xics_migrate_irqs_away()
242 				virq, cpu);  in xics_migrate_irqs_away()
244 		/* Reset affinity to all cpus */  in xics_migrate_irqs_away()
245 		raw_spin_unlock_irqrestore(&desc->lock, flags);  in xics_migrate_irqs_away()
249 		raw_spin_unlock_irqrestore(&desc->lock, flags);  in xics_migrate_irqs_away()
259 	 * safe. If we're using icp-opal this may actually allow all  in xics_migrate_irqs_away()
262 	icp_ops->set_priority(DEFAULT_PRIORITY);  in xics_migrate_irqs_away()
269  * For the moment we only implement delivery to all cpus or one cpu.
271  * If the requested affinity is cpu_all_mask, we set global affinity.
272  * If not we set it to the first cpu in the mask, even if multiple cpus
292 			return -1;  in xics_get_irq_server()
312 	return xics_ics->host_match(xics_ics, node) ? 1 : 0;  in xics_host_match()
333 	 * actually works. The device-tree parsing will turn the LSIs  in xics_host_map()
346 		return -EINVAL;  in xics_host_map()
348 	if (xics_ics->check(xics_ics, hwirq))  in xics_host_map()
349 		return -EINVAL;  in xics_host_map()
352 	irq_domain_set_info(domain, virq, hwirq, xics_ics->chip,  in xics_host_map()
385 	 * affect the resend function when re-enabling an edge interrupt.  in xics_set_irq_type()
394 		return -EINVAL;  in xics_set_irq_type()
418 	return xics_host_xlate(d, to_of_node(fwspec->fwnode), fwspec->param,  in xics_host_domain_translate()
419 			       fwspec->param_count, hwirq, type);  in xics_host_domain_translate()
437 		irq_domain_set_info(domain, virq + i, hwirq + i, xics_ics->chip,  in xics_host_domain_alloc()
467 		return -ENOMEM;  in xics_allocate_domain()
472 		return -ENOMEM;  in xics_allocate_domain()
494 	np = of_find_compatible_node(NULL, NULL, "ibm,ppc-xics");  in xics_get_server_size()
498 	isize = of_get_property(np, "ibm,interrupt-server#-size", NULL);  in xics_get_server_size()
507 	int rc = -1;  in xics_init()
514 		if (rc == -ENODEV)  in xics_init()
523 	ppc_md.get_irq = icp_ops->get_irq;  in xics_init()
526 	xics_ipi_chip.irq_eoi = icp_ops->eoi;  in xics_init()