diff options
| author | Dragos Tatulea <dtatulea@nvidia.com> | 2023-12-25 15:42:10 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-01-10 13:01:37 -0500 |
| commit | a09483c4065fe1e14812f2371cee1cba78a13d60 (patch) | |
| tree | 5113b681eefbfe60a6bde1d16842f365398cc849 /drivers/vhost | |
| parent | c7e194402be3ed385dfaefaf1681bb731fd776e2 (diff) | |
vdpa: Block vq property changes in DRIVER_OK
The virtio standard doesn't allow for virtqueue address and state
changes when the device is in DRIVER_OK. Return an error in such cases
unless the device is suspended.
The suspended device exception is needed because some devices support
virtqueue changes when the device is suspended.
Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Suggested-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20231225134210.151540-3-dtatulea@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/vdpa.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 5f046770c0a4..5c3e019c0122 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -703,6 +703,9 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, switch (cmd) { case VHOST_SET_VRING_ADDR: + if ((ops->get_status(vdpa) & VIRTIO_CONFIG_S_DRIVER_OK) && !v->suspended) + return -EINVAL; + if (ops->set_vq_address(vdpa, idx, (u64)(uintptr_t)vq->desc, (u64)(uintptr_t)vq->avail, @@ -711,6 +714,9 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, break; case VHOST_SET_VRING_BASE: + if ((ops->get_status(vdpa) & VIRTIO_CONFIG_S_DRIVER_OK) && !v->suspended) + return -EINVAL; + if (vhost_has_feature(vq, VIRTIO_F_RING_PACKED)) { vq_state.packed.last_avail_idx = vq->last_avail_idx & 0x7fff; vq_state.packed.last_avail_counter = !!(vq->last_avail_idx & 0x8000); |