1 // SPDX-License-Identifier: GPL-2.0-only
6  * Copyright (c) 2013, Alexander Graf <agraf@suse.de>
12  *   Alexander Graf <agraf@suse.de>
28 	irq_rt = srcu_dereference_check(kvm->irq_routing, &kvm->irq_srcu,  in kvm_irq_map_gsi()
29 					lockdep_is_held(&kvm->irq_lock));  in kvm_irq_map_gsi()
30 	if (irq_rt && gsi < irq_rt->nr_rt_entries) {  in kvm_irq_map_gsi()
31 		hlist_for_each_entry(e, &irq_rt->map[gsi], link) {  in kvm_irq_map_gsi()
44 	irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu);  in kvm_irq_map_chip_pin()
45 	return irq_rt->chip[irqchip][pin];  in kvm_irq_map_chip_pin()
52 	if (!kvm_arch_irqchip_in_kernel(kvm) || (msi->flags & ~KVM_MSI_VALID_DEVID))  in kvm_send_userspace_msi()
53 		return -EINVAL;  in kvm_send_userspace_msi()
55 	route.msi.address_lo = msi->address_lo;  in kvm_send_userspace_msi()
56 	route.msi.address_hi = msi->address_hi;  in kvm_send_userspace_msi()
57 	route.msi.data = msi->data;  in kvm_send_userspace_msi()
58 	route.msi.flags = msi->flags;  in kvm_send_userspace_msi()
59 	route.msi.devid = msi->devid;  in kvm_send_userspace_msi()
74 	int ret = -1, i, idx;  in kvm_set_irq()
82 	idx = srcu_read_lock(&kvm->irq_srcu);  in kvm_set_irq()
84 	srcu_read_unlock(&kvm->irq_srcu, idx);  in kvm_set_irq()
86 	while (i--) {  in kvm_set_irq()
106 	for (i = 0; i < rt->nr_rt_entries; ++i) {  in free_irq_routing_table()
110 		hlist_for_each_entry_safe(e, n, &rt->map[i], link) {  in free_irq_routing_table()
111 			hlist_del(&e->link);  in free_irq_routing_table()
123 	struct kvm_irq_routing_table *rt = rcu_access_pointer(kvm->irq_routing);  in kvm_free_irq_routing()
134 	u32 gsi = array_index_nospec(ue->gsi, KVM_MAX_IRQ_ROUTES);  in setup_routing_entry()
138 	 * Allow only one to one mapping between GSI and non-irqchip routing.  in setup_routing_entry()
140 	hlist_for_each_entry(ei, &rt->map[gsi], link)  in setup_routing_entry()
141 		if (ei->type != KVM_IRQ_ROUTING_IRQCHIP ||  in setup_routing_entry()
142 		    ue->type != KVM_IRQ_ROUTING_IRQCHIP ||  in setup_routing_entry()
143 		    ue->u.irqchip.irqchip == ei->irqchip.irqchip)  in setup_routing_entry()
144 			return -EINVAL;  in setup_routing_entry()
146 	e->gsi = gsi;  in setup_routing_entry()
147 	e->type = ue->type;  in setup_routing_entry()
151 	if (e->type == KVM_IRQ_ROUTING_IRQCHIP)  in setup_routing_entry()
152 		rt->chip[e->irqchip.irqchip][e->irqchip.pin] = e->gsi;  in setup_routing_entry()
154 	hlist_add_head(&e->link, &rt->map[e->gsi]);  in setup_routing_entry()
180 			return -EINVAL;  in kvm_set_irq_routing()
188 		return -ENOMEM;  in kvm_set_irq_routing()
190 	new->nr_rt_entries = nr_rt_entries;  in kvm_set_irq_routing()
193 			new->chip[i][j] = -1;  in kvm_set_irq_routing()
196 		r = -ENOMEM;  in kvm_set_irq_routing()
201 		r = -EINVAL;  in kvm_set_irq_routing()
202 		switch (ue->type) {  in kvm_set_irq_routing()
204 			if (ue->flags & ~KVM_MSI_VALID_DEVID)  in kvm_set_irq_routing()
208 			if (ue->flags)  in kvm_set_irq_routing()
218 	mutex_lock(&kvm->irq_lock);  in kvm_set_irq_routing()
219 	old = rcu_dereference_protected(kvm->irq_routing, 1);  in kvm_set_irq_routing()
220 	rcu_assign_pointer(kvm->irq_routing, new);  in kvm_set_irq_routing()
223 	mutex_unlock(&kvm->irq_lock);  in kvm_set_irq_routing()
227 	synchronize_srcu_expedited(&kvm->irq_srcu);  in kvm_set_irq_routing()
243  * when userspace-driven IRQ routing is activated, and so that kvm->irq_routing
244  * is guaranteed to be non-NULL.
253 		return -ENOMEM;  in kvm_init_irq_routing()
255 	new->nr_rt_entries = 1;  in kvm_init_irq_routing()
258 	memset(new->chip, -1, chip_size);  in kvm_init_irq_routing()
260 	RCU_INIT_POINTER(kvm->irq_routing, new);  in kvm_init_irq_routing()