diff options
Diffstat (limited to 'virt/kvm/irq_comm.c')
| -rw-r--r-- | virt/kvm/irq_comm.c | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c index ddc17f0e2f35..08a9a49481b2 100644 --- a/virt/kvm/irq_comm.c +++ b/virt/kvm/irq_comm.c @@ -62,6 +62,8 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src, int i, r = -1; struct kvm_vcpu *vcpu, *lowest = NULL; + WARN_ON(!mutex_is_locked(&kvm->irq_lock)); + if (irq->dest_mode == 0 && irq->dest_id == 0xff && kvm_is_dm_lowest_prio(irq)) printk(KERN_INFO "kvm: apic: phys broadcast and lowest prio\n"); @@ -113,7 +115,7 @@ static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, return kvm_irq_delivery_to_apic(kvm, NULL, &irq); } -/* This should be called with the kvm->lock mutex held +/* This should be called with the kvm->irq_lock mutex held * Return value: * < 0 Interrupt was ignored (masked or not delivered for other reasons) * = 0 Interrupt was coalesced (previous irq is still pending) @@ -125,6 +127,8 @@ int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level) unsigned long *irq_state, sig_level; int ret = -1; + WARN_ON(!mutex_is_locked(&kvm->irq_lock)); + if (irq < KVM_IOAPIC_NUM_PINS) { irq_state = (unsigned long *)&kvm->arch.irq_states[irq]; @@ -175,19 +179,26 @@ void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin) void kvm_register_irq_ack_notifier(struct kvm *kvm, struct kvm_irq_ack_notifier *kian) { + mutex_lock(&kvm->irq_lock); hlist_add_head(&kian->link, &kvm->arch.irq_ack_notifier_list); + mutex_unlock(&kvm->irq_lock); } -void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian) +void kvm_unregister_irq_ack_notifier(struct kvm *kvm, + struct kvm_irq_ack_notifier *kian) { + mutex_lock(&kvm->irq_lock); hlist_del_init(&kian->link); + mutex_unlock(&kvm->irq_lock); } -/* The caller must hold kvm->lock mutex */ int kvm_request_irq_source_id(struct kvm *kvm) { unsigned long *bitmap = &kvm->arch.irq_sources_bitmap; - int irq_source_id = find_first_zero_bit(bitmap, + int irq_source_id; + + mutex_lock(&kvm->irq_lock); + irq_source_id = find_first_zero_bit(bitmap, sizeof(kvm->arch.irq_sources_bitmap)); if (irq_source_id >= sizeof(kvm->arch.irq_sources_bitmap)) { @@ -197,6 +208,7 @@ int kvm_request_irq_source_id(struct kvm *kvm) ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID); set_bit(irq_source_id, bitmap); + mutex_unlock(&kvm->irq_lock); return irq_source_id; } @@ -207,6 +219,7 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id) ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID); + mutex_lock(&kvm->irq_lock); if (irq_source_id < 0 || irq_source_id >= sizeof(kvm->arch.irq_sources_bitmap)) { printk(KERN_ERR "kvm: IRQ source ID out of range!\n"); @@ -215,19 +228,24 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id) for (i = 0; i < KVM_IOAPIC_NUM_PINS; i++) clear_bit(irq_source_id, &kvm->arch.irq_states[i]); clear_bit(irq_source_id, &kvm->arch.irq_sources_bitmap); + mutex_unlock(&kvm->irq_lock); } void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, struct kvm_irq_mask_notifier *kimn) { + mutex_lock(&kvm->irq_lock); kimn->irq = irq; hlist_add_head(&kimn->link, &kvm->mask_notifier_list); + mutex_unlock(&kvm->irq_lock); } void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, struct kvm_irq_mask_notifier *kimn) { + mutex_lock(&kvm->irq_lock); hlist_del(&kimn->link); + mutex_unlock(&kvm->irq_lock); } void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask) @@ -235,6 +253,8 @@ void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask) struct kvm_irq_mask_notifier *kimn; struct hlist_node *n; + WARN_ON(!mutex_is_locked(&kvm->irq_lock)); + hlist_for_each_entry(kimn, n, &kvm->mask_notifier_list, link) if (kimn->irq == irq) kimn->func(kimn, mask); @@ -250,7 +270,9 @@ static void __kvm_free_irq_routing(struct list_head *irq_routing) void kvm_free_irq_routing(struct kvm *kvm) { + mutex_lock(&kvm->irq_lock); __kvm_free_irq_routing(&kvm->irq_routing); + mutex_unlock(&kvm->irq_lock); } static int setup_routing_entry(struct kvm_kernel_irq_routing_entry *e, @@ -325,13 +347,13 @@ int kvm_set_irq_routing(struct kvm *kvm, e = NULL; } - mutex_lock(&kvm->lock); + mutex_lock(&kvm->irq_lock); list_splice(&kvm->irq_routing, &tmp); INIT_LIST_HEAD(&kvm->irq_routing); list_splice(&irq_list, &kvm->irq_routing); INIT_LIST_HEAD(&irq_list); list_splice(&tmp, &irq_list); - mutex_unlock(&kvm->lock); + mutex_unlock(&kvm->irq_lock); r = 0; |