This allows it to test if the guest has aknowledge an invalid transport
feature for SVQ. This will include packed vq layout or event_idx,
where VirtIO device needs help from SVQ.
There is not needed at this moment, but since SVQ will not re-negotiate
features again with the guest, a failure in acknowledge them is fatal
for SVQ.
Signed-off-by: Eugenio Pérez <epere...@redhat.com>
---
hw/virtio/vhost-shadow-virtqueue.h | 1 +
hw/virtio/vhost-shadow-virtqueue.c | 6 ++++++
2 files changed, 7 insertions(+)
diff --git a/hw/virtio/vhost-shadow-virtqueue.h
b/hw/virtio/vhost-shadow-virtqueue.h
index 946b2c6295..ac55588009 100644
--- a/hw/virtio/vhost-shadow-virtqueue.h
+++ b/hw/virtio/vhost-shadow-virtqueue.h
@@ -16,6 +16,7 @@
typedef struct VhostShadowVirtqueue VhostShadowVirtqueue;
bool vhost_svq_valid_device_features(uint64_t *features);
+bool vhost_svq_valid_guest_features(uint64_t *features);
void vhost_svq_set_svq_kick_fd(VhostShadowVirtqueue *svq, int svq_kick_fd);
void vhost_svq_set_guest_call_notifier(VhostShadowVirtqueue *svq, int call_fd);
diff --git a/hw/virtio/vhost-shadow-virtqueue.c
b/hw/virtio/vhost-shadow-virtqueue.c
index 6e0508a231..cb9ffcb015 100644
--- a/hw/virtio/vhost-shadow-virtqueue.c
+++ b/hw/virtio/vhost-shadow-virtqueue.c
@@ -62,6 +62,12 @@ bool vhost_svq_valid_device_features(uint64_t *dev_features)
return true;
}
+/* If the guest is using some of these, SVQ cannot communicate */
+bool vhost_svq_valid_guest_features(uint64_t *guest_features)
+{
+ return true;
+}
+
/* Forward guest notifications */
static void vhost_handle_guest_kick(EventNotifier *n)
{
--
2.27.0
