msix: add helper to unuse all msix entries

will be used by virtio on soft reset

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/hw/msix.c b/hw/msix.c
index 548ffd5c8b..d49944111f 100644
--- a/hw/msix.c
+++ b/hw/msix.c
@@ -378,3 +378,10 @@ void msix_vector_unuse(PCIDevice *dev, unsigned vector)
     if (vector < dev->msix_entries_nr && dev->msix_entry_used[vector])
         --dev->msix_entry_used[vector];
 }
+
+void msix_unuse_all_vectors(PCIDevice *dev)
+{
+    if (!(dev->cap_present & QEMU_PCI_CAP_MSIX))
+        return;
+    msix_free_irq_entries(dev);
+}