Add support to virtio-ccw devices for handling the extra data sent from
the driver to the device when the VIRTIO_F_NOTIFICATION_DATA transport
feature has been negotiated.
The extra data that's passed to the virtio-ccw device when this feature
is enabled varies depending on the device's virtqueue layout.
That data passed to the virtio-ccw device is in the same format as the
data passed to virtio-pci devices.
Acked-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
---
hw/s390x/s390-virtio-ccw.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 62804cc228..828052046b 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -140,9 +140,11 @@ static void subsystem_reset(void)
static int virtio_ccw_hcall_notify(const uint64_t *args)
{
uint64_t subch_id = args[0];
- uint64_t queue = args[1];
+ uint64_t data = args[1];
SubchDev *sch;
+ VirtIODevice *vdev;
int cssid, ssid, schid, m;
+ uint16_t vq_idx = data;
if (ioinst_disassemble_sch_ident(subch_id, &m, &cssid, &ssid, &schid)) {
return -EINVAL;
@@ -151,12 +153,18 @@ static int virtio_ccw_hcall_notify(const uint64_t *args)
if (!sch || !css_subch_visible(sch)) {
return -EINVAL;
}
- if (queue >= VIRTIO_QUEUE_MAX) {
+
+ if (vq_idx >= VIRTIO_QUEUE_MAX) {
return -EINVAL;
}
- virtio_queue_notify(virtio_ccw_get_vdev(sch), queue);
- return 0;
+ vdev = virtio_ccw_get_vdev(sch);
+ if (virtio_vdev_has_feature(vdev, VIRTIO_F_NOTIFICATION_DATA)) {
+ virtio_queue_set_shadow_avail_data(vdev, data);
+ }
+
+ virtio_queue_notify(vdev, vq_idx);
+ return 0;
}
static int virtio_ccw_hcall_early_printk(const uint64_t *args)
--
2.39.3