@@ -396,6 +396,65 @@ static void virtio_mmio_reset(DeviceState *d)
proxy->guest_page_shift = 0;
}
+static int virtio_mmio_set_guest_notifier(DeviceState *d, int n, bool assign,
+ bool with_irqfd)
+{
+ VirtIOMMIOProxy *proxy = VIRTIO_MMIO(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
+ VirtQueue *vq = virtio_get_queue(vdev, n);
+ EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
+
+ if (assign) {
+ int r = event_notifier_init(notifier, 0);
+ if (r < 0) {
+ return r;
+ }
+ virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
+ } else {
+ virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
+ event_notifier_cleanup(notifier);
+ }
+
+ if (vdc->guest_notifier_mask) {
+ vdc->guest_notifier_mask(vdev, n, !assign);
+ }
+
+ return 0;
+}
+
+static int virtio_mmio_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
+{
+ VirtIOMMIOProxy *proxy = VIRTIO_MMIO(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ /* TODO: need to check if kvm-arm supports irqfd */
+ bool with_irqfd = false;
+ int r, n;
+
+ nvqs = MIN(nvqs, VIRTIO_PCI_QUEUE_MAX);
+
+ for (n = 0; n < nvqs; n++) {
+ if (!virtio_queue_get_num(vdev, n)) {
+ break;
+ }
+
+ r = virtio_mmio_set_guest_notifier(d, n, assign, with_irqfd);
+ if (r < 0) {
+ goto assign_error;
+ }
+ }
+
+ return 0;
+
+assign_error:
+ /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
+ assert(assign);
+ while (--n >= 0) {
+ virtio_mmio_set_guest_notifier(d, n, !assign, false);
+ }
+ return r;
+}
+
static int virtio_mmio_set_host_notifier(DeviceState *opaque, int n, bool assign)
{
VirtIOMMIOProxy *proxy = VIRTIO_MMIO(opaque);
@@ -476,6 +535,7 @@ static void virtio_mmio_bus_class_init(ObjectClass *klass, void *data)
k->save_config = virtio_mmio_save_config;
k->load_config = virtio_mmio_load_config;
k->set_host_notifier = virtio_mmio_set_host_notifier;
+ k->set_guest_notifiers = virtio_mmio_set_guest_notifiers;
k->get_features = virtio_mmio_get_features;
k->device_plugged = virtio_mmio_device_plugged;
k->has_variable_vring_alignment = true;
Same as host notifier of virtio-mmio, most of codes came from virtio-pci. The kvm-arm does not yet support irqfd, need to fix the hard-coded part after kvm-arm gets irqfd support. Signed-off-by: Ying-Shiuan Pan <yspan@itri.org.tw> --- hw/virtio/virtio-mmio.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+)