[Qemu-devel] [PATCH-RFC 06/13] s390-virtio: fill in irqfd support

["Michael S. Tsirkin" <mst@redhat.com>]

Don't know how to make queuefd work: probably need support for binding
hypercalls to eventfd in kvm?  Again, just a demonstration, probably not
for commit, because s390 does not have vector support.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/s390-virtio-bus.c |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/hw/s390-virtio-bus.c b/hw/s390-virtio-bus.c
index 980e7eb..b663972 100644
--- a/hw/s390-virtio-bus.c
+++ b/hw/s390-virtio-bus.c
@@ -315,11 +315,27 @@ static unsigned virtio_s390_get_features(void *opaque)
     return dev->host_features;
 }
 
+static void virtio_s390_irqfd_read(void *opaque)
+{
+    VirtQueue *vq = opaque;
+    virtio_irq(vq->vdev, vq);
+}
+
+static int virtio_s390_irqfd(void * opaque, int n, int fd, bool assign)
+{
+    VirtIOS390Device *dev = opaque;
+    VirtQueue *vq = &dev->vdev->vq[n];
+
+    qemu_set_fd_handler(fd, assign ? virtio_s390_irqfd_read : NULL, NULL, vq);
+    return 0;
+}
+
 /**************** S390 Virtio Bus Device Descriptions *******************/
 
 static const VirtIOBindings virtio_s390_bindings = {
     .notify = virtio_s390_notify,
     .get_features = virtio_s390_get_features,
+    .set_irqfd = virtio_s390_irqfd,
 };
 
 static VirtIOS390DeviceInfo s390_virtio_net = {
-- 
1.6.6.rc1.43.gf55cc