35 lines
1.4 KiB
Diff
35 lines
1.4 KiB
Diff
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From: Denis Plotnikov <dplotnikov@virtuozzo.com>
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Date: Tue, 24 Dec 2019 11:14:46 +0300
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Subject: virtio-mmio: update queue size on guest write
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Git-commit: 1049f4c62c4070618cc5defc9963c6a17ae7a5ae
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Some guests read back queue size after writing it.
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Always update the on size write otherwise they might be confused.
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Cc: qemu-stable@nongnu.org
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Signed-off-by: Denis Plotnikov <dplotnikov@virtuozzo.com>
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Message-Id: <20191224081446.17003-1-dplotnikov@virtuozzo.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Bruce Rogers <brogers@suse.com>
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---
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hw/virtio/virtio-mmio.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c
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index 94d934c44b6ca63a4d5c72258e90..1e40a74869dad64fd172e1279b25 100644
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--- a/hw/virtio/virtio-mmio.c
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+++ b/hw/virtio/virtio-mmio.c
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@@ -295,8 +295,9 @@ static void virtio_mmio_write(void *opaque, hwaddr offset, uint64_t value,
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break;
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case VIRTIO_MMIO_QUEUE_NUM:
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trace_virtio_mmio_queue_write(value, VIRTQUEUE_MAX_SIZE);
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+ virtio_queue_set_num(vdev, vdev->queue_sel, value);
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+
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if (proxy->legacy) {
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- virtio_queue_set_num(vdev, vdev->queue_sel, value);
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virtio_queue_update_rings(vdev, vdev->queue_sel);
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} else {
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proxy->vqs[vdev->queue_sel].num = value;
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