openamp: add VIRTIO_RING_F_MUST_NOTIFY event

add VIRTIO_RING_F_MUST_NOTIFY support to can't suppress interrupt Signed-off-by: ligd <[email protected]>
OpenAMP · Sep 18, 2024 · 271499b · 271499b
1 parent c468328
commit 271499b
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diff --git a/lib/include/openamp/virtqueue.h b/lib/include/openamp/virtqueue.h
@@ -48,6 +48,9 @@ extern "C" {
 /* Support to suppress interrupt until specific index is reached. */
 #define VIRTIO_RING_F_EVENT_IDX        (1 << 29)
 
+/* Support to can't suppress interrupt. */
+#define VIRTIO_RING_F_MUST_NOTIFY      (1 << 30)
+
 /* cache invalidation helpers */
 #define CACHE_FLUSH(x, s)		metal_cache_flush(x, s)
 #define CACHE_INVALIDATE(x, s)		metal_cache_invalidate(x, s)

diff --git a/lib/virtio/virtqueue.c b/lib/virtio/virtqueue.c
@@ -609,6 +609,9 @@ static int vq_ring_must_notify(struct virtqueue *vq)
 {
 	uint16_t new_idx, prev_idx, event_idx;
 
+	if (vq->vq_dev->features & VIRTIO_RING_F_MUST_NOTIFY)
+		return 1;
+
 	if (vq->vq_dev->features & VIRTIO_RING_F_EVENT_IDX) {
 		if (VIRTIO_ROLE_IS_DRIVER(vq->vq_dev)) {
 			/* CACHE: no need to invalidate avail */