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virtio-mmio: add support for configure interrupt

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Add configure interrupt support for virtio-mmio bus. This
interrupt will be working while the backend is vhost-vdpa

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20211104164827.21911-10-lulu@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Cindy Lu 2021-11-05 00:48:26 +08:00 committed by Michael S. Tsirkin
parent 497679d510
commit d48185f1a4
1 changed files with 27 additions and 0 deletions
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27
hw/virtio/virtio-mmio.c
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@ -673,7 +673,30 @@ static int virtio_mmio_set_guest_notifier(DeviceState *d, int n, bool assign,
return 0;
}
static int virtio_mmio_set_config_guest_notifier(DeviceState *d, bool assign)
{
VirtIOMMIOProxy *proxy = VIRTIO_MMIO(d);
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
bool with_irqfd = false;
EventNotifier *notifier = virtio_config_get_guest_notifier(vdev);
int r = 0;
if (assign) {
r = event_notifier_init(notifier, 0);
if (r < 0) {
return r;
}
virtio_config_set_guest_notifier_fd_handler(vdev, assign, with_irqfd);
} else {
virtio_config_set_guest_notifier_fd_handler(vdev, assign, with_irqfd);
event_notifier_cleanup(notifier);
}
if (vdc->guest_notifier_mask && vdev->use_guest_notifier_mask) {
vdc->guest_notifier_mask(vdev, VIRTIO_CONFIG_IRQ_IDX, !assign);
}
return r;
}
static int virtio_mmio_set_guest_notifiers(DeviceState *d, int nvqs,
bool assign)
{
@ -695,6 +718,10 @@ static int virtio_mmio_set_guest_notifiers(DeviceState *d, int nvqs,
goto assign_error;
}
}
r = virtio_mmio_set_config_guest_notifier(d, assign);
if (r < 0) {
goto assign_error;
}
return 0;