diff options
Diffstat (limited to 'hw/virtio-pci.c')
| -rw-r--r-- | hw/virtio-pci.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c index 86e6b0a561..729917d891 100644 --- a/hw/virtio-pci.c +++ b/hw/virtio-pci.c @@ -451,6 +451,33 @@ static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign) return 0; } +static int virtio_pci_set_guest_notifiers(void *opaque, bool assign) +{ + VirtIOPCIProxy *proxy = opaque; + VirtIODevice *vdev = proxy->vdev; + int r, n; + + for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { + if (!virtio_queue_get_num(vdev, n)) { + break; + } + + r = virtio_pci_set_guest_notifier(opaque, n, assign); + if (r < 0) { + goto assign_error; + } + } + + return 0; + +assign_error: + /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */ + while (--n >= 0) { + virtio_pci_set_guest_notifier(opaque, n, !assign); + } + return r; +} + static int virtio_pci_set_host_notifier(void *opaque, int n, bool assign) { VirtIOPCIProxy *proxy = opaque; @@ -488,7 +515,7 @@ static const VirtIOBindings virtio_pci_bindings = { .load_queue = virtio_pci_load_queue, .get_features = virtio_pci_get_features, .set_host_notifier = virtio_pci_set_host_notifier, - .set_guest_notifier = virtio_pci_set_guest_notifier, + .set_guest_notifiers = virtio_pci_set_guest_notifiers, }; static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev, |