lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

KVM: Interrupt mask notifiers for ioapic

Browse Source 
Allow clients to request notifications when the guest masks or unmasks a
particular irq line.  This complements irq ack notifications, as the guest
will not ack an irq line that is masked.

Currently implemented for the ioapic only.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity
2009-01-04 17:10:50 +02:00
parent 5d9b8e30f5
commit 75858a84a6
4 changed files with 50 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
virt/kvm/irq_comm.c
View File

@@ -99,3 +99,27 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id)
clear_bit(irq_source_id, &kvm->arch.irq_states[i]);
clear_bit(irq_source_id, &kvm->arch.irq_sources_bitmap);
}
void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
struct kvm_irq_mask_notifier *kimn)
{
kimn->irq = irq;
hlist_add_head(&kimn->link, &kvm->mask_notifier_list);
}
void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
struct kvm_irq_mask_notifier *kimn)
{
hlist_del(&kimn->link);
}
void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask)
{
struct kvm_irq_mask_notifier *kimn;
struct hlist_node *n;
hlist_for_each_entry(kimn, n, &kvm->mask_notifier_list, link)
if (kimn->irq == irq)
kimn->func(kimn, mask);
}