51 lines
1.8 KiB
Diff
51 lines
1.8 KiB
Diff
From: Stefano Garzarella <sgarzare@redhat.com>
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Date: Mon, 21 Sep 2020 14:25:06 +0200
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Subject: [PATCH] vhost-vsock-ccw: force virtio version 1
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virtio-vsock was introduced after the release of VIRTIO 1.0
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specifications, so it should be 'modern-only'.
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This patch forces virtio version 1 as done for vhost-vsock-pci.
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To avoid migration issues, we force virtio version 1 only when
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legacy check is enabled in the new machine types (>= 5.1).
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Cc: qemu-stable@nongnu.org
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Suggested-by: Cornelia Huck <cohuck@redhat.com>
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Reviewed-by: Cornelia Huck <cohuck@redhat.com>
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Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
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Message-Id: <20200921122506.82515-5-sgarzare@redhat.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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(cherry picked from commit a6704a34cf02add13964149e0de6453ae62bd9db)
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---
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hw/s390x/vhost-vsock-ccw.c | 12 ++++++++++++
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1 file changed, 12 insertions(+)
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diff --git a/hw/s390x/vhost-vsock-ccw.c b/hw/s390x/vhost-vsock-ccw.c
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index 0822ecca89..246416a8f9 100644
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--- a/hw/s390x/vhost-vsock-ccw.c
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+++ b/hw/s390x/vhost-vsock-ccw.c
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@@ -40,9 +40,21 @@ static void vhost_vsock_ccw_class_init(ObjectClass *klass, void *data)
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static void vhost_vsock_ccw_instance_init(Object *obj)
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{
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VHostVSockCCWState *dev = VHOST_VSOCK_CCW(obj);
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+ VirtioCcwDevice *ccw_dev = VIRTIO_CCW_DEVICE(obj);
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+ VirtIODevice *virtio_dev;
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virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
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TYPE_VHOST_VSOCK);
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+
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+ virtio_dev = VIRTIO_DEVICE(&dev->vdev);
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+
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+ /*
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+ * To avoid migration issues, we force virtio version 1 only when
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+ * legacy check is enabled in the new machine types (>= 5.1).
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+ */
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+ if (!virtio_legacy_check_disabled(virtio_dev)) {
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+ ccw_dev->force_revision_1 = true;
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+ }
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}
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static const TypeInfo vhost_vsock_ccw_info = {
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