44 lines
1.5 KiB
Diff
44 lines
1.5 KiB
Diff
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From 9a8e63285c30026a8fabaf0ed8af323eafd07539 Mon Sep 17 00:00:00 2001
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From: ligd <liguiding1@xiaomi.com>
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Date: Thu, 23 Jun 2022 00:41:13 +0800
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Subject: [PATCH 07/14] openamp: add VIRTIO_RING_F_MUST_NOTIFY event
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Change-Id: I455c4a5427fbcc60c6f61707c4304c12aa13ee58
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Signed-off-by: ligd <liguiding1@xiaomi.com>
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---
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lib/include/openamp/virtqueue.h | 3 +++
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lib/virtio/virtqueue.c | 3 +++
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2 files changed, 6 insertions(+)
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diff --git a/lib/include/openamp/virtqueue.h open-amp/lib/include/openamp/virtqueue.h
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index 8194398..dd42c3a 100644
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--- a/lib/include/openamp/virtqueue.h
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+++ open-amp/lib/include/openamp/virtqueue.h
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@@ -48,6 +48,9 @@ extern "C" {
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/* Support to suppress interrupt until specific index is reached. */
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#define VIRTIO_RING_F_EVENT_IDX (1 << 29)
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+/* Support to can't suppress interrupt. */
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+#define VIRTIO_RING_F_MUST_NOTIFY (1 << 30)
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+
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/* cache invalidation helpers */
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#define CACHE_FLUSH(x, s) metal_cache_flush(x, s)
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#define CACHE_INVALIDATE(x, s) metal_cache_invalidate(x, s)
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diff --git a/lib/virtio/virtqueue.c open-amp/lib/virtio/virtqueue.c
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index 363fda8..7ffe569 100644
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--- a/lib/virtio/virtqueue.c
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+++ open-amp/lib/virtio/virtqueue.c
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@@ -609,6 +609,9 @@ static int vq_ring_must_notify(struct virtqueue *vq)
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{
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uint16_t new_idx, prev_idx, event_idx;
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+ if (vq->vq_dev->features & VIRTIO_RING_F_MUST_NOTIFY)
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+ return 1;
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+
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if (vq->vq_dev->features & VIRTIO_RING_F_EVENT_IDX) {
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if (VIRTIO_ROLE_IS_DRIVER(vq->vq_dev)) {
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/* CACHE: no need to invalidate avail */
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--
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2.34.1
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