From 3f5311e1a80539a9cc21905fd3134709417e3747 Mon Sep 17 00:00:00 2001 From: Cindy Lu Date: Thu, 22 Dec 2022 15:04:50 +0800 Subject: [PATCH] virtio-mmio: add support for configure interrupt Add configure interrupt support in virtio-mmio bus. add function to set configure guest notifier. Signed-off-by: Cindy Lu Message-Id: <20221222070451.936503-10-lulu@redhat.com> Acked-by: Jason Wang Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin Signed-off-by: fangyi --- hw/virtio/virtio-mmio.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c index 72da12fea5..508dd4cdb7 100644 --- a/hw/virtio/virtio-mmio.c +++ b/hw/virtio/virtio-mmio.c @@ -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, + bool with_irqfd) +{ + VirtIOMMIOProxy *proxy = VIRTIO_MMIO(d); + VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); + VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev); + 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, with_irqfd); + if (r < 0) { + goto assign_error; + } return 0; -- 2.27.0