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| author | Stefano Garzarella <sgarzare@redhat.com> | 2020-09-21 14:25:04 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-09-29 02:15:24 -0400 |
| commit | 6209070503989cf4f28549f228989419d4f0b236 (patch) | |
| tree | 805f645d010498658845014a74c5ed4a17924d11 | |
| parent | d55f518248f263bb8d0852f98e47102ea09d4f89 (diff) | |
| download | qemu-6209070503989cf4f28549f228989419d4f0b236.zip qemu-6209070503989cf4f28549f228989419d4f0b236.tar.gz qemu-6209070503989cf4f28549f228989419d4f0b236.tar.bz2 | |
vhost-vsock-pci: force virtio version 1
Commit 9b3a35ec82 ("virtio: verify that legacy support is not
accidentally on") added a safety check that requires to set
'disable-legacy=on' on vhost-vsock-pci device:
$ ./qemu-system-x86_64 ... -device vhost-vsock-pci,guest-cid=5
qemu-system-x86_64: -device vhost-vsock-pci,guest-cid=5:
device is modern-only, use disable-legacy=on
virtio-vsock was introduced after the release of VIRTIO 1.0
specifications, so it should be 'modern-only'.
In addition Cornelia verified that forcing a legacy mode on
vhost-vsock-pci device using x86-64 host and s390x guest, so with
different endianness, produces strange behaviours.
This patch forces virtio version 1 and removes the 'transitional_name'
property removing the need to specify 'disable-legacy=on' on
vhost-vsock-pci device.
To avoid migration issues, we force virtio version 1 only when
legacy check is enabled in the new machine types (>= 5.1).
As the transitional device name is not commonly used, we do not
provide compatibility handling for it.
Cc: qemu-stable@nongnu.org
Reported-by: Qian Cai <caiqian@redhat.com>
Reported-by: Qinghua Cheng <qcheng@redhat.com>
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1868449
Suggested-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20200921122506.82515-3-sgarzare@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | hw/virtio/vhost-vsock-pci.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/hw/virtio/vhost-vsock-pci.c b/hw/virtio/vhost-vsock-pci.c index e56067b..205da8d 100644 --- a/hw/virtio/vhost-vsock-pci.c +++ b/hw/virtio/vhost-vsock-pci.c @@ -44,6 +44,15 @@ static void vhost_vsock_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) { VHostVSockPCI *dev = VHOST_VSOCK_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); + VirtIODevice *virtio_dev = VIRTIO_DEVICE(vdev); + + /* + * To avoid migration issues, we force virtio version 1 only when + * legacy check is enabled in the new machine types (>= 5.1). + */ + if (!virtio_legacy_check_disabled(virtio_dev)) { + virtio_pci_force_virtio_1(vpci_dev); + } qdev_realize(vdev, BUS(&vpci_dev->bus), errp); } @@ -73,7 +82,6 @@ static void vhost_vsock_pci_instance_init(Object *obj) static const VirtioPCIDeviceTypeInfo vhost_vsock_pci_info = { .base_name = TYPE_VHOST_VSOCK_PCI, .generic_name = "vhost-vsock-pci", - .transitional_name = "vhost-vsock-pci-transitional", .non_transitional_name = "vhost-vsock-pci-non-transitional", .instance_size = sizeof(VHostVSockPCI), .instance_init = vhost_vsock_pci_instance_init, |