kvm: Introduce kvm_irqchip_update_msi_route

This service allows to update an MSI route without releasing/reacquiring
the associated VIRQ. Will be used by PCI device assignment, later on
likely also by virtio/vhost and VFIO.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/kvm.h b/kvm.h
index 37d1f8166a..5cefe3a1a3 100644
--- a/kvm.h
+++ b/kvm.h
@@ -270,6 +270,7 @@ int kvm_set_ioeventfd_mmio(int fd, uint32_t adr, uint32_t val, bool assign,
 int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign);
 
 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg);
+int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg);
 void kvm_irqchip_release_virq(KVMState *s, int virq);
 
 int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);