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[PATCH v4 3/4] virtio-mmio: add support for configure interrupt
From: |
Cindy Lu |
Subject: |
[PATCH v4 3/4] virtio-mmio: add support for configure interrupt |
Date: |
Tue, 23 Mar 2021 09:56:40 +0800 |
add configure interrupt support for virtio-mmio bus. This
interrupt will working while backend is vhost-vdpa
Signed-off-by: Cindy Lu <lulu@redhat.com>
---
hw/virtio/virtio-mmio.c | 30 ++++++++++++++++++++++++++++--
1 file changed, 28 insertions(+), 2 deletions(-)
diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c
index e1b5c3b81e..beabd129ef 100644
--- a/hw/virtio/virtio-mmio.c
+++ b/hw/virtio/virtio-mmio.c
@@ -627,12 +627,30 @@ static int virtio_mmio_set_guest_notifier(DeviceState *d,
int n, bool assign,
}
if (vdc->guest_notifier_mask && vdev->use_guest_notifier_mask) {
- vdc->guest_notifier_mask(vdev, n, !assign);
+ vdc->guest_notifier_mask(vdev, n, !assign, VIRTIO_VQ_VECTOR);
}
-
return 0;
}
+static int virtio_mmio_set_config_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);
+ EventNotifier *notifier = virtio_get_config_notifier(vdev);
+ int r = 0;
+ if (assign) {
+ r = event_notifier_init(notifier, 0);
+ virtio_set_config_notifier_fd_handler(vdev, true, false);
+ } else {
+ virtio_set_config_notifier_fd_handler(vdev, false, false);
+ event_notifier_cleanup(notifier);
+ }
+ if (vdc->guest_notifier_mask && vdev->use_guest_notifier_mask) {
+ vdc->guest_notifier_mask(vdev, 0, !assign, VIRTIO_CONFIG_VECTOR);
+ }
+ return r;
+}
static int virtio_mmio_set_guest_notifiers(DeviceState *d, int nvqs,
bool assign)
{
@@ -654,8 +672,15 @@ static int virtio_mmio_set_guest_notifiers(DeviceState *d,
int nvqs,
goto assign_error;
}
}
+ r = virtio_mmio_set_config_notifier(d, assign);
+ if (r < 0) {
+ goto config_assign_error;
+ }
return 0;
+config_assign_error:
+ assert(assign);
+ r = virtio_mmio_set_config_notifier(d, false);
assign_error:
/* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
@@ -666,6 +691,7 @@ assign_error:
return r;
}
+
static void virtio_mmio_pre_plugged(DeviceState *d, Error **errp)
{
VirtIOMMIOProxy *proxy = VIRTIO_MMIO(d);
--
2.21.3